Captain O-Ring – Replacement A20063 A20064 Orings for Fluval 304, 305, 306, 307, 404, 405, 406, 407 Canister Filter Motor Head Lid Seal Ring (2 Pack)

It will last a year an is worth the money to know it will not leak.

These O-rings are a great fit and replacement part for the Fluval 307 and 407 cannister filters. Whenever I do filter maintenance every 3 months I change out the O-rings. Filter has never leaked or given me issues on fitment.

Original Fluval O-ring broke in 2014 and leaked all over the floor. It created a syphon and dumped approximately 30 gallons of water from my turtle's tank onto the floor. Since then, I periodically change the o-ring with these (about once every 2 years) and have not had a problem. Works as advertised.

Good product. Doesn’t leak anymore.

Works great, my filter had constant purges due to a leaking o ring on the suction side. Fits great, no more air purges.

As expected. Fit perfectly

Does exactly what it was designed to do. Good replacement parts for your canister filter.

Same thickness as the fluval seal