This Is the 8 x 1mm Safety Spinner Hub from Harry B Higley. FEATURES: Aluminum construction with a hex This carefully polished hub gives an electric starter"s rubber cup a large gripping area. Holes are predrilled for tightening purposes INCLUDES: (1) Safety Spinner Hub SPECS Shaft Size: 8x1mm Weight: 1oz Diameter: 7/8" NMH 2-23-98 ir/le kr3/26/03