Camco 39553 RV Sewer Hose 3" Twist-It Clamps - Pack of 2

you can put the duct on and off with out tools

Easy on/off because of the thumb screws.

what i ordered

Simple product that’s hard to make incorrectly. These are great product.

*****

Price is great and the product is sturdy. I was concerned when I read a prior review stating they weren't happy with the thumb screws. They are sturdy and works just fine, as does the entire product. Wide open the diameter is 3.5 inches, and can be tightened all the way to 2.5 inches.

Plastic part is very fragile and snapped easily. It still serves the purpose but quality not at par.

I exclusively use these for my chinese diesel heater(slivel brand) for my rooftop tent. They make setting up the heater that much easier and faster without the need for tools, and the plastic holds up well to winter weather without cracking or breaking. For the price, you can't beat them and larger worm gear style clamps cost about the same, making the purchase a no brainer.

Works as it should, good quality

Easier to use than the traditional screwdriver style clamp

What can I say, they are 3" hose clamps and work well. Convenient to use since you don't need to have a tool handy to tighten and loosen them. I have a couple sets for my diesel heater setup.

These are perfect for my diesel heater pipe attachments. Need quick release. Perfect! Glad I found these!!!!

Expensive, but does what it does. “Cheap feel”