Shaft Collar, System of Measurement Metric, Bore Type Round, Bore Diameter 28 mm, Bore Thread Size Not Applicable, Collar Outside Diameter 48 mm, Inside Height to Flat Not Applicable, Clearance Diameter 54.7 mm, Collar Width 15 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