Four lots assorted filter media for polishing press', 15" x 15" and 16" x 16". see IPP stock numbers below. Lot numbers 804, 805, 806, & 807. Media by Ertel Grade 175 P, Die #26 Lot # 34062. Media by Millipore MSTK, 35DN die # 414 Millipore Item # L30DN 4140.