Powermate Air Compressor VSF1080421 Gasket Kit E100959 Power Mate Powermate Air Compressor Gasket Kit Part Number E100959 Compatible With Powermate Air Compressor Model: VSF1080421 / Industrial Air Brand Model: CP1080224 / Sears Craftsman Air Compressor Model: 921.153101 Round Gaskets Measure 3-1/8" Outside Diameter with the bolt Holes measuring 2-9/16" across center to center. The Head Gasket Meay measure a little bit larger in diameter just because its cut a little larger on the outside. Square Gasket is 2.5" Across, and the crankcase oil seal rubber gasket measures about 4" wide and 3-3/4" Tall