Opal XL 225/270 Tank O-Ring color_White and Gray Outside Diamter 12-7/8 inches

Outside Diamter 12-7/8 inches

There is no counterweight included

This fitting is specifically designed to fit the Sta-Rite Swimquip 8428 and 8429 eyeball fittings

It will fit the PAL

This is a Pentair Hex Head Nut 3/8-16 that is Brass Nickel Plated and used in Pentair WhisperFlo and IntelliFlo pool pumps

Opal XL 225/270 Tank O-Ring color_White and Gray Outside Diamter 12-7/8 inchesThis is a Waterco Opal XL tank o ring replacement for the Opal XL 225 and 270 models. The o ring seals the filter tank or lid, helping to prevent leaks and keeping the cartridge housing properly closed. It is made of EPDM and Teflon coated.