Heaters R185-405, 206-406, 207-407 O-Ring Gaskets - Set of 2 fitting-type_Bushing It is an excellent choice

It is an excellent choice for your swimming pool vacuuming needs

reinforced polyester cartridge elements provide a maximum filtration area and easily trap dirt and debris

Recommended for commercial rails and lifeguard chairs

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Heaters R185-405, 206-406, 207-407 O-Ring Gaskets - Set of 2 fitting-type_Bushing It is an excellent choiceThis is a Raypak O Ring Gasket for their model 185 405, 106 406 and 107 407 Residential Heaters. The dimensions are: 9 1 4 Inch Inner Diameter x 1 8 Inch Thickness for the Polymer Heat Exchanger. This item is designed to fit Raypak pool heater models such as the 206A; 266A; 336A; 406A Digital Atmospheric; 207A; 267A; 337A; 407A Digital Low NOx Pool Heaters.