DOES NOT INCLUDE RUBBER GASKET - This product is one of the Skim-Vac models that does not come with a rubber gasket. This Skim-Vac model relies on its specially designed sealing surface. Please note that scuffs or other types of surface damage may affect the Skim-Vacs ability to hold suction.POOL SKIMMER VACUUM PLATE - Skim-Vac SP1106 and SP1107, for example, are just a bit smaller at 7 inches compared to SP11071's 7 1/4 inches in diameter. Including the hose elbow adapter, the vacuum plate's length is 8.2 inches. Please note that Skim-Vac models are not interchangeable.SKIM VAC 11/4 INCHES AND 11/2 INCHESCOMBO HOSE ELBOW ADAPTER - The combo hose adapter is removable and replaceable with elbow adapter part number SPX1088H. The 90-degree elbow has a 1 3/10-inch opening with a 1 1/10-inch adapter for vacuum hoses.PRECISION ALTERNATIVES - You'll also vacuum from the skimmer basket instead of the pump's strainer basket, removing the risk of clogs caused by the debris. And with an exact fit Skim-Vac, vacuuming is a breeze. PLEASE NOTE - This is an aftermarket part produced by meeting OEM quality (based on in-house testing). We have no affiliation with or endorsement from any of the manufacturers mentioned, includin Hayward.COMPATIBLE Hayward SP1089 FRONT ACCESS-STYLE SKIMMERS - Part number SP11071 is only compatible with one hayward skimmer model, Dyna-Skim In-Ground Pool Skimmer SP1089 with 7 1/2 perforated basket. And since SP1089 is a front access skimmer, you'll need to remove the cover or the wire to install the Skim-Vac.