32MB 100 pin SDRAM MEMORY DIMM for HP LaserJet 1200 2200 4000 4050 5000 One (1) 32MB PC100 sdram sodimm Part#: C7845A, C4143A, KTH-LJ4100/32, KTH-LJ4000/32, Q7707AX 100% compatible with lifetime replacement warranty Manufactured by Keystron, LLC Keystron is a registered trademark of Keystron, LLC