Specification Brand : YMHYJY BulletPoint1 : This is for a Waterway 5 Pack Combo containing (2) 2" Heater Gasket Orings, designed to fit all standard 2" Spa Heater Assemblies. BulletPoint2 : For 2" Plumbing ( Actual Measurement Across Gasket is 3" ) BulletPoint3 : Fits Gecko, Hydro Quip, Aeware,United and most other Flow Thu Assemblies. BulletPoint4 : Stop Leaking Waterways: Fits Most Spa Pump or Heater Unions. BulletPoint5 : Application: This gasket goes on unions between the union and pump wet end fittings and heaters and union fittings. ExternallyAssignedProductIdentifier1 : 0727238758489 ExternallyAssignedProductIdentifier2 : 727238758489 ItemName : YMHYJY fits 2" O-Ring Spa Hot Tub Heater Gasket for 711-4030B (5 Pack) ItemPackageDimensions_Height : 8.509 centimeters ItemPackageDimensions_Length : 2.2098 centimeters ItemPackageDimensions_Width : 7.493 centimeters ItemTypeKeyword : swimming-pool-and-spa-replacement-parts Manufacturer : YMHYJY Material : Silicone ProductDescription : 5 Pack Spa Hot Tub Pump Heater Union Gasket/O-Ring - 2'' ID Flat Gasket Works on Variety of Spas. Fits Gecko, Hydro Quip, Aeware,United and most other Flow Thu Assemblies. Stop Leaking Waterways: Fits Most Spa Pump or Heater Unions. Tip For Easy Installation: Use your choice of silicone grease on one side, or both sides, to help hold the spa gasket in place while assembling the union which will also allow easier removal in the future. Thank you for visting to our store . SupplierDeclaredDgHzRegulation : not_applicable