This is a pump piston o-ring O-207 replacement for Hayward item GMX142Z2. This o-ring is also identical to these part numbers: Baker Hydro 00B7014, Harmsco 551, Hayward GMX142Z2, Pentair/Purex 070212, Sta-Rite 00B7014, Sta-Rite/Swimquip 355150314.
This o-ring has been manufactured in accordance with OEM specifications and is designed to meet or exceed the original manufacturer specifications.