--- product_id: 389740142 title: "Maytronics Dolphin 9991466-ASSY or 9991466-R4 Ultra Fine Filter Cartridges" brand: "dolphin" price: "$233.90" currency: USD in_stock: true reviews_count: 5 category: "Dolphin" url: https://www.desertcart.us/products/389740142-maytronics-dolphin-9991466-assy-or-9991466-r4-ultra-fine-filter store_origin: US region: United States of America --- # Maytronics Dolphin 9991466-ASSY or 9991466-R4 Ultra Fine Filter Cartridges **Brand:** dolphin **Price:** $233.90 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** Maytronics Dolphin 9991466-ASSY or 9991466-R4 Ultra Fine Filter Cartridges by dolphin - **How much does it cost?** $233.90 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/389740142-maytronics-dolphin-9991466-assy-or-9991466-r4-ultra-fine-filter) ## Best For - dolphin enthusiasts ## Why This Product - Trusted dolphin brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Maytronics Dolphin 9991466-ASSY or 9991466-R4 Ultra Fine Filter Cartridges : desertcart.in: Industrial & Scientific Review: These filters solved all my pool vacuuming problems! - The video shows what the filters collected in the filter basket from cleaning my pool floor; and the photo is the same filter basket after I sprayed that gunk out with a hose. I bought these in 2024 for my Dolphin Cayman Robotic Pool Vacuum. These filters are a MUST HAVE for your Cayman if you have dirt or algae growing on your pool floor because they keep all those tiny dirt and algae particles inside the basket. The filters that actually came with my robot aren’t fine enough to keep those tiny particles inside the filter basket. Instead, it would vacuum up the dirt and algae and spit it out the back, causing nasty cloudy, dirty pool water. These “nano” filters stop that from happening. They are easy to install and I was worried they wouldn’t fit my Cayman Robot but they do—you just have to remove a couple screws, change the filter walls, and put the screws back in place. Also, I think it should be mentioned that these filters are easy to clean. I spray my filter basket out with a hose after every use and it takes about 30 seconds to get all 4 filter walls clean. I highly recommend these filters for the Dolphin Cayman Robotic Pool Vacuum. They’ve survived a full summer and 3 uses this season, and are still going strong. Review: Cumple su cometido perfectamente - Lo he empleado ya dos veces y hasta el momento muy bien, los filtros recogen partículas microscópicas en mi caso solo una pequeña particularidad y es que el cierre del filtro la tapa de abajo hay que apretar fuerte, porque si no lo haces luego al sacarlas se engancha porque se queda abierta, pero si lo tienes en cuenta y la aprietas bien no hay ningún problema me pongo cuatro estrellas porque me funciona bien ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0745T3WCH | | Assembly Required | No | | Brand | Dolphin | | Country of Publication | USA | | Customer Reviews | 4.5 out of 5 stars 311 Reviews | | Global Trade Identification Number | 00810071221002, 07290018363379 | | Is Assembly Required? | No | | Item Type Name | ehf not applicable | | Item Weight | 0.01 Ounces | | Manufacturer | rotary | | Manufacturer Part Number | 9991466-R4 | | Model Number | 9991466-R4 | | Power Source | ac | ## Images ![Maytronics Dolphin 9991466-ASSY or 9991466-R4 Ultra Fine Filter Cartridges - Image 1](https://m.media-amazon.com/images/I/81sBOXYTI9L.jpg) ![Maytronics Dolphin 9991466-ASSY or 9991466-R4 Ultra Fine Filter Cartridges - Image 2](https://m.media-amazon.com/images/I/71ESywZB07L.jpg) ![Maytronics Dolphin 9991466-ASSY or 9991466-R4 Ultra Fine Filter Cartridges - Image 3](https://m.media-amazon.com/images/I/81EEYy8dJ3L.jpg) ![Maytronics Dolphin 9991466-ASSY or 9991466-R4 Ultra Fine Filter Cartridges - Image 4](https://m.media-amazon.com/images/I/61rJTZt9tpL.jpg) ![Maytronics Dolphin 9991466-ASSY or 9991466-R4 Ultra Fine Filter Cartridges - Image 5](https://m.media-amazon.com/images/I/610tcHboOmL.jpg) ## Questions & Answers **Q: Does this include the basket or is it just the replacement filters?** A: Just the filters. **Q: These look like the ultra fine. But the pics in comments say fine. The one that came with robot is see through and garbage. is this ultra fine?** A: It is ultra fine. And it’s excellent. Personally, I bought another basket with the ultra fine so I have a basket with ultra fine panels and one with the large debris panels. This was the first year I used the large debris panel basket. It worked like a charm clearing my pool of large amounts of leaves and debris at the beginning of the season. You may want to try it next year. Like you, I thought it useless! **Q: can i just buy the ultra fine panels to change out with the basket panels that come with dolphin nautilus or do i need the entire basket?** A: You just change out the coarse filters that it came with :) Same basket. **Q: Will this fit the Dolphin T15 ?** A: I own the Dolphin, and purchased the refill, and they do fit. ## Customer Reviews ### ⭐⭐⭐⭐⭐ These filters solved all my pool vacuuming problems! *by A***R on 8 June 2025* The video shows what the filters collected in the filter basket from cleaning my pool floor; and the photo is the same filter basket after I sprayed that gunk out with a hose. I bought these in 2024 for my Dolphin Cayman Robotic Pool Vacuum. These filters are a MUST HAVE for your Cayman if you have dirt or algae growing on your pool floor because they keep all those tiny dirt and algae particles inside the basket. The filters that actually came with my robot aren’t fine enough to keep those tiny particles inside the filter basket. Instead, it would vacuum up the dirt and algae and spit it out the back, causing nasty cloudy, dirty pool water. These “nano” filters stop that from happening. They are easy to install and I was worried they wouldn’t fit my Cayman Robot but they do—you just have to remove a couple screws, change the filter walls, and put the screws back in place. Also, I think it should be mentioned that these filters are easy to clean. I spray my filter basket out with a hose after every use and it takes about 30 seconds to get all 4 filter walls clean. I highly recommend these filters for the Dolphin Cayman Robotic Pool Vacuum. They’ve survived a full summer and 3 uses this season, and are still going strong. ### ⭐⭐⭐⭐ Cumple su cometido perfectamente *by Á***A on 30 August 2026* Lo he empleado ya dos veces y hasta el momento muy bien, los filtros recogen partículas microscópicas en mi caso solo una pequeña particularidad y es que el cierre del filtro la tapa de abajo hay que apretar fuerte, porque si no lo haces luego al sacarlas se engancha porque se queda abierta, pero si lo tienes en cuenta y la aprietas bien no hay ningún problema me pongo cuatro estrellas porque me funciona bien ### ⭐⭐⭐⭐⭐ These work great. *by L***A on 20 June 2022* Picks up dirt and everything --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/389740142-maytronics-dolphin-9991466-assy-or-9991466-r4-ultra-fine-filter](https://www.desertcart.us/products/389740142-maytronics-dolphin-9991466-assy-or-9991466-r4-ultra-fine-filter) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-11-13*