Shaft Collar, System of Measurement Metric, Bore Type Round, Bore Diameter 75 mm, Bore Thread Size Not Applicable, Collar Outside Diameter 120 mm, Inside Height to Flat Not Applicable, Clearance Diameter Not Applicable, Collar Width 19 mm, Collar Material Aluminum, Keyway Width Not Applicable, Collar Material Grade 6061, Keyway Depth Not Applicable, Thread Direction Not Applicable, Center to Lever Top 60 mm, Collar Construction 1-Piece, Screw Material Stainless Steel This product contains a chemical that is regulated under California Proposition 65. Warning: This product contains a chemical known to the State of California to cause cancer. Warning: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm. -