Check the listing for details. OR-360B O-Rings for Culligan HF-360B Water Filter Housing (4 Pack). Condition: New. Listed at 14.69 USD. Captain O-Ring – Replacement OR-360B Orings for Culligan HF-360B Water Filter Housing (4 Pack) Product Features: Part Number: OR-360B (also called OR360B) The OR-360B o-ring is compatible with Culligan HR-360B whole house water filter housings. The o-rings (also called gaskets or seals) are used to seal the housing canister to the filter head/cap to prevent leaks. 4 Pack of O-Rings: The HF-360B housing uses two OR-360B o-rings to seal the cap to the canister. Replace your old, worn, leaking o-rings and have a spare set on hand for the future with this handy 4-pack of o-rings. It is recommended to change your o-rings every third water filter change (or when there is visible damage/deformation to the o-ring) to prevent leaks. Approximate O-Ring Dimensions: 3.11” Inside Diameter (just under 3-1/8”), 3.35” Outside Diameter (just under 3-3/8”), 0.12” Thickness (just under 1.8”). Manufactured and warrantied by Captain O-Ring LLC. Proudly assembled in the USA! Get your water filter housing back in working order with Captain O-Ring’s replacement OR-360B o-rings. The OR-360B o-rings are compatible with Culligan HF-360B whole house water filter housings. Each HF-360B housing uses two OR-360B o-rings to seal the filter cap to the cannister. This handy 4-pack of o-rings allows you to replace your old, worn, leaking o-rings and have a spare set on hand for future changes. Approximate O-Ring Dimensions: 3.11” Inside Diameter (just under 3-1/8”), 3.35” Outside Diameter (just under 3-3/8”), 0.12” Thickness (just under 1.8”). Package contains four (4) o-rings. Manufactured and warrantied by Captain O-Ring LLC. Proudly assembled in the USA!