Generic Buna-N O-Ring [15-15/16" ID] [5/16" CS] (90-423-6115) leviton which many users prefer because

which many users prefer because it feels more active than a simple fixed jet

Gray finish supports a subtle and cohesive appearance

Helps restore proper directional flow support

A return face cover is useful because it helps finish the return opening neatly

cord length

Generic Buna-N O-Ring [15-15/16" ID] [5/16" CS] (90-423-6115) leviton which many users prefer becauseA Buna N O ring helps create a seal at a compatible large diameter circular connection, and this generic version is sized with a 15 15 16 inch inside diameter and a substantial 5 16 inch cross section using the 90 423 6115 reference. When a large profile O ring becomes worn, stretched, or compressed, the assembly can lose the sealing support it should maintain around the full circumference. The heavier 5 16 inch cross section gives this O ring