Pentek CQE-PT-03189 O-Rings for Big Blue 10x5 and 20x5 Water Filters

O-Rings for Big Blue 10x5 and 20x5 inch Water Filter Housings that accomodate 4.5 to 5 inch wide water filters. A set of 3 orings. Actual Diameter: 5.465 inch (inside diameter) or (139 mm x 5.8 mm) Material: Buna-N Rubber. The most common o rings (o-rings) used in water filtration are made from Buna N material. Buna N is also commonly referred to as nitrile. This is the ideal choice for cold water filtration because they are inexpensive and have superior performance characteristics. Typical housing for these o-rings is blue (blue with blue cap, blue with black cap) outside dimentions for the housing can be 12x7 or 23x7 inches. Measure actual o-ring diameter for better match. Quantity: 3

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