Shaft Collar, System of Measurement Metric, Bore Type Round, Bore Diameter 14 mm, Bore Thread Size Not Applicable, Collar Outside Diameter 30 mm, Inside Height to Flat Not Applicable, Clearance Diameter 33.7 mm, Collar Width 11 mm, Collar Material Stainless Steel, Keyway Width Not Applicable, Collar Material Grade 303, Keyway Depth Not Applicable, Thread Direction Not Applicable, Center to Lever Top Not Applicable, Collar Construction 2-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. -