This is an o-ring replacement, 210 x 4mm, O-160, designed for the Speck 21-80 GS Volute Casing. This o-ring is identical to: Pentair/PacFab 152501, Speck 2923241200, Sta-Rite U9241.
This o-ring has been manufactured in accordance with OEM specifications and are designed to meet or exceed the original manufacturer specifications.