Specification Brand : American Spa Parts BulletPoint1 : 2" which measures about 3" ID Heater Split Nut Kit which includes the split nut , (2) Screws and a gasket.. BulletPoint2 : For use with a 2" Heater or Pump Union that would measure about 3" Edge to Edge on the threaded side. BulletPoint3 : This Split Nut DOES NOT FIT SALUSPA DO NOT ORDER it for SALUSPA.. BulletPoint4 : BulletPoint5 : BulletPoint6 : Color : Black ExternallyAssignedProductIdentifier1 : 0740016010067 ExternallyAssignedProductIdentifier2 : 740016010067 ItemName : (1X) 2" Split Nut Kit for Heater Union with Gasket Video How To ItemPackageDimensions_Height : 10.16 centimeters ItemPackageDimensions_Length : 3.81 centimeters ItemPackageDimensions_Width : 9.144 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : swimming-pool-and-spa-replacement-parts Manufacturer : YEUNAS Material : Rubber ModelNumber : ASP2splitnutgasket1x NumberOfPieces : 3 PartNumber : ASP2splitnutgasket1x ProductDescription : This Split Nut DOES NOT FIT SALUSPA DO NOT ORDER it for SALUSPA.. This part is a 2" which measures about 3" ID Heater Split Nut Kit which includes the split nut , (2) Screws and a gasket for use with a 2" Heater Union that would measure about 3" Edge to Edge on the threaded side. The Heater Flange Split Nut mounts to the heater tube using 2 screws to hold it in place and screws onto the heater threaded union with a gasket between the union and tube. If your plumbing is 2" and your heater is 2" this part is correct. This version is the most popular version. 1 1/2 x 1 1/2 is 2nd most popular and 1 1/2" X 2 is 3rd most popular.This part is used in hot tubs to plumb a heater tube to a heater union. Note: The Heater tube in pictures is NOT included!! For the video that tells about this part search YouTube for "Hot Tub Spa Part 2" Heater Split Nut Information How To The Hot Tub Professor" ProductSiteLaunchDate : 2014-10-16T20:21:23.389Z SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnitCount : 2