Spacer Block with O-RingReplacement gaskets, O-rings and components are made from the highest-quality materials availableRebuild kits are available in master kits, body-only kits and accelerator pump kitsMade in the U.S.A.Units: Each Insulator Thickness: 25,40 mm (1,00 inch) Product Name: Spacer Block Type: Insulator Model: Super G