512MB 100 pin DDR SDRAM DIMM for HP. Third Party Equivalent to HP Part Numbers: Q2628A Q7720A . BEWARE! DO NOT BUY FROM OTHER VENDORS WHO CLAIM THEY ARE SELLING PARTS-QUICK BRAND. OUR WARRANTY IS ONLY FOR ITEMS PURCHASED DIRECTLY FROM PARTS-QUICK. ALL PRODUCTS BRANDED AS PARTS-QUICK ARE TO BE SOLD SOLELY BY PARTS-QUICK. PARTS-QUICK DOES NOT AUTHORIZE THE USE OF IT'S BRANDED PRODUCTS TO OTHER SELLERS. .\n Compatible with:\nHP LaserJet M4345 M4345x M4345xs M4345xm