Pit Pal 3003 Cast Aluminum Gas Fill Flange Bright polished flange with rounded corners. Gas fill hole 2-3/8 Diameter. Options for 2-1/4 and 2-1/2 Gas Fill Hole Diameter available. Size 10 screw mounting holes. Dimensions: 7-1/8 L x 7-1/8 H x 3 D (Total Depth).