• Square o-ring 

• 8 ½” buttress closure 

• Used with Purex SFSM Side Mount Sand, TR-40, 50, 60, 100, 100HD, 140 

The Pacfab 5Hp Challenger O-Ring – 152509 is a square O-ring gasket for TR100C and TR140C Triton filter. This replacement O-ring features an 8.5-inch buttress closure and is durably built.