Check the listing for details. Captain O-Ring OmniFilter K4 Replacement Water Filter ORing Kit (2 Sets, 8pcs). Condition: New. Listed at 11.59 USD. Captain O-Ring - OmniFilter K4 Replacement O-Ring Kit for CBF1, CBF3, SFM2, U30, USM2, OT32, RO2000, RO2050, and More (2 Sets) Product Features: The OmniFilter K4 Replacement O-Ring Kit (also called K4-4PAK, K4-R, K4-04, K4-DC6-S18) contains 4 different o-ring sizes to fix your leaking water system. This convenient 2 set package contains 2 of each size, for 8 o-ring gasket seals total. Compatible with: OmniFilter CBF1, CBF3 Series A, CBF20, OB3, OB5, OT32 Series A, Omni Super, Omni Deluxe, Omni Regular, OT5, RO2000, ROT2000-TDS, R12, R14, SFM2 Series A, Total 2, Total Plus, UC2, U30, U400, U450, U500, U600, U700; Culligan US-316; DuPont WFDW12009W, WFDW12000, WFDW13000, WFCH1 Material: Buna-N (nitrile butadiene rubber) Manufactured and Warrantied by Captain O-Ring LLC, with decades of experience in the sealing and chemical industry. The OmniFilter K4 Replacement O-Ring Kit (also called K4-4PAK, K4-R, K4-04, K4-DC6-S18) contains 4 different o-ring sizes. This convenient 2 set package contains 2 of each size, for 8 o-rings total. Compatible with: OmniFilter CBF1, CBF3 Series A, CBF20, OB3, OB5, OT32 Series A, Omni Super, Omni Deluxe, Omni Regular, OT5, RO2000, ROT2000-TDS, R12, R14, SFM2 Series A, Total 2, Total Plus, UC2, U30, U400, U450, U500, U600, U700 Culligan US-316 DuPont WFDW12009W, WFDW12000, WFDW13000, WFCH1 What to expect: This item includes eight (8) o-rings (4 sizes, 2 of each size) in a resealable zip-top poly bag with "Captain O-Ring" branded packaging. Manufactured and warrantied against defect for one year by Captain O-Ring LLC. "Captain O-Ring" is a registered trademark of Captain O-Ring LLC.