| HP LaserJet Printer Memory Compatablity | ||
| Part # | Size | Used In |
| C2065A | 4MB | HP LaserJet 4/4M/4Si/IIISi |
| C2066A | 8MB | HP LaserJet 4/4M/4Si/IIISi |
| C3133A | 8MB | HP LaserJet 4+/5/5M/5Si/6P |
| C3146A | 16MB | HP LaserJet 4+/4V/5P/6P/5Si/5 |
| C3148A | 4MB | HP LaserJet 5L/6L |
| C4136A | 8MB | HP LaserJet 1100/2100/4000/5000/8000/8100 |
| C4137A | 16MB | HP LaserJet 1100/2100/4000/5000/8000/8100 |
| C7824A | 8MB | HP LaserJet 4000/5000/8000/8100/8150 |
| C7845A | 32MB | HP LaserJet 1200/4000/5000/8000/8100 |
| Q2625A | 64MB DIMM | HP LaserJet 2410/2420/2430/4250/4345/4350 |
| Q2626A | 128MB DIMM | HP LaserJet 2410/2420/2430/4250/4345/4350 |
| Q2627A | 256MB DIMM | HP LaserJet 2410/2420/2430/4250/4345/4350 |
| C9121A | 128MB | HP LaserJet 2300/4100/5100/9000/4200/2500 |