(Pack of 6) Aqua Optima Replacement water filter for these models: Aqua Optima AUH012, AUR002, PJ0615, PJ0616, PJ0617, PJ0618, PJ0619, PJ0620, PJ0621, PJ0623, PJ0624, PJ0626, PJ0617, PJ0628. WQA Certified Performance to NSF/ANSI 42, 53, 372. BPA and Lead-Free.