Brand Name: Culligan
*Interior Diameter: 4 in.
*Material: Rubber
*Product Type: O-Ring
*Number in Package: 2 pk
*Exterior Diameter: 4-3/8 in.
*Shape: Round
*Inlet: 0.75
*Brand Compatibility: Fits HF-150, HF-150A
*Packaging Type: Bagged
*Wall Thickness: 0.125 in.