`-5 Pack- CLX200K Hayward Pool Chlorinator Lid O-Ring for CL200-CL220 O-101

Be aware all of the reviews from 2015 and earlier were based on products that Professor Foam did NOT sell! Professor Foam started selling his EPDM Chemical resistant o rings in 2016!  The previous seller was sending a Buna-N o rings wihch will last 2 - 3 weeks. This is NOT what Professor Foam is selling! These O Rings from Professor Foam are aftermarket and are made from EPDM. This is the best available material over Viton, Buna or any other material for this use. Professor Foam will give a 1 year warranty on his EPDM o rings! No questions asked!  You can trust the Professor!