Comet O-Ring For APS Series Pumps | Ø3, 53 x 215, 5
This item is highlighted as # 58 on the product illustration on the right side.
This o-ring from Comet Pumps is part # 1210 0371 and is a replacement item that goes with the APS Series pumps, APS 141 - APS 166.
It measures Ø3, 53 x 215, 5.