Hayward SP1099 Skimmer Basket heatpro hp6003t hp11003t hp21003t hp21203t hp2100tc03t The exclusive Perflex Extended Cycle gives APCC7436 The exclusive Perflex Extended Cycle gives you long filter cycles between cleaning up to eight weeks depending on pool size and use and the flakes have a larger surface area to help build a luscious crust Application Model 1090 Series Auto Skim Skimmer Part Type Basket Basket Height 3 1 2" Manufacturer Hayward Bottom Outside Dimension 4 5 16" x 2 3 16" Model SP1099 Series Top Inside Dimension 3 1 16" x 4 11 16" Skimmer Type Spa Front Access Top Outside Dimension 4 1 2" x 5 1 8" Manufacturer Part # SPX1099B