Membranes Pentek-Pentair TLC-24; DRY; NSF TLC-36; DRY; NSF TLC-50; DRY; NSF TLC-75; DRY; NSF TLC-100; DRY; NSF Filmtec 1.8″X12″ 24 GPD 1.8″X12″ 36 GPD 1.8″X12″ 50 GPD 1.8″X12″ 100 GPD 1.8″X12″ 75 GPD HR Element-Dry