---
product_id: 117991241
title: "128MB 100 pin PC100 Printer Memory DIMM Compatible with HP C9121A Q7709A for Laserjet 4200 4200n 4200tn 4200dtn 4200dtns 4200dtnsl"
brand: "keystron"
price: "$28.99"
currency: USD
in_stock: true
reviews_count: 1
url: https://www.desertcart.us/products/117991241-128mb-100-pin-pc100-printer-memory-dimm-compatible-with-hp
store_origin: US
region: United States of America
---

# 128MB RAM 100-pin DIMM USA made 128MB 100 pin PC100 Printer Memory DIMM Compatible with HP C9121A Q7709A for Laserjet 4200 4200n 4200tn 4200dtn 4200dtns 4200dtnsl

**Brand:** keystron
**Price:** $28.99
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate Your Printing Game with Keystron Memory!

## Quick Answers

- **What is this?** 128MB 100 pin PC100 Printer Memory DIMM Compatible with HP C9121A Q7709A for Laserjet 4200 4200n 4200tn 4200dtn 4200dtns 4200dtnsl by keystron
- **How much does it cost?** $28.99 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/117991241-128mb-100-pin-pc100-printer-memory-dimm-compatible-with-hp)

## Best For

- keystron enthusiasts

## Why This Product

- Trusted keystron brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted Brand:** Manufactured by Keystron, a name you can rely on.
- • **Compact Design:** Space-saving dimensions of just 2 x 2 x 0.3 inches.
- • **Lifetime Assurance:** Enjoy peace of mind with a lifetime replacement warranty.
- • **Seamless Compatibility:** Perfectly fits HP LaserJet 4200 series printers.
- • **Boost Your Printer's Performance:** Upgrade to 128MB SDRAM for lightning-fast printing!

## Overview

This 128MB PC100 100-pin DIMM is designed for HP LaserJet 4200 series printers, ensuring seamless compatibility and enhanced performance. Manufactured by Keystron, LLC, it comes with a lifetime replacement warranty, making it a reliable choice for professionals seeking efficiency and quality.

## Description

Compatible with HP LaserJet 4200 4200n 4200tn 4200dtn 4200dtns 4200dtnsl

## Features

- One 128MB PC100 100-pin sodimm
- Part#: C9121A, Q9121A, Q7709A
- 100% compatible with lifetime replacement warranty
- Manufactured by Keystron, LLC
- Keystron is a registered trademark of Keystron, LLC

## Technical Specifications

| Specification | Value |
|---------------|-------|
| RAM | 128 MB SDRAM |
| Brand | Keystron |
| Item model number | C9121A, Q9121A, Q7709A |
| Item Weight | 1 ounces |
| Product Dimensions | 2 x 2 x 0.3 inches |
| Item Dimensions  LxWxH | 2 x 2 x 0.3 inches |
| Computer Memory Type | SDRAM |
| Manufacturer | Keystron, LLC |
| ASIN | B00H4JSV38 |
| Country of Origin | USA |
| Is Discontinued By Manufacturer | No |
| Date First Available | September 19, 2013 |

## Images

![128MB 100 pin PC100 Printer Memory DIMM Compatible with HP C9121A Q7709A for Laserjet 4200 4200n 4200tn 4200dtn 4200dtns 4200dtnsl - Image 1](https://m.media-amazon.com/images/I/815fFiz+UrL._AC_UL320_.jpg)
![128MB 100 pin PC100 Printer Memory DIMM Compatible with HP C9121A Q7709A for Laserjet 4200 4200n 4200tn 4200dtn 4200dtns 4200dtnsl - Image 2](https://m.media-amazon.com/images/I/815fFiz+UrL._AC_UL480_FMwebp_QL65_.jpg)
![128MB 100 pin PC100 Printer Memory DIMM Compatible with HP C9121A Q7709A for Laserjet 4200 4200n 4200tn 4200dtn 4200dtns 4200dtnsl - Image 3](https://m.media-amazon.com/images/I/815fFiz+UrL._AC_UL640_FMwebp_QL65_.jpg)
![128MB 100 pin PC100 Printer Memory DIMM Compatible with HP C9121A Q7709A for Laserjet 4200 4200n 4200tn 4200dtn 4200dtns 4200dtnsl - Image 4](https://m.media-amazon.com/images/I/815fFiz+UrL._AC_UL800_FMwebp_QL65_.jpg)
![128MB 100 pin PC100 Printer Memory DIMM Compatible with HP C9121A Q7709A for Laserjet 4200 4200n 4200tn 4200dtn 4200dtns 4200dtnsl - Image 5](https://m.media-amazon.com/images/I/815fFiz+UrL._AC_UL960_FMwebp_QL65_.jpg)

## Customer Reviews

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Four Stars
  

*by C***M on Reviewed in the United States on August 25, 2015*

Fast Shipping. Item worked as expected.

---

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**Shop now:** [https://www.desertcart.us/products/117991241-128mb-100-pin-pc100-printer-memory-dimm-compatible-with-hp](https://www.desertcart.us/products/117991241-128mb-100-pin-pc100-printer-memory-dimm-compatible-with-hp)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-20*