1.263" inside diameter 2.250" outside diameter material is rulon; furnished with 2 holes 3/16 inch dia, 82 degrees csk to 3/8 inch dia left of center on flanged 1-7/8 inch bolt circle dia; 1 hole 11/32 inch dia drilled right of center on right side 3/4 inch down from bottom of flange lip; used on drum-assembly cable levelwind round