California Proposition 65: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm. Shaft Collar, System of Measurement Inch, Bore Type Threaded, Bore Diameter 7/8 in, Bore Thread Size 7/8 In. -9, Collar Outside Diameter 1 5/8 in, Inside Height to Flat Not Applicable, Clearance Diameter 1.92 in, Collar Width 1/2 in, Collar Material Stainless Steel, Keyway Width Not Applicable, Collar Material Grade 303, Keyway Depth Not Applicable, Thread Direction Right Hand Thread, Center to Lever Top Not Applicable, Collar Construction 1-Piece, Screw Material Stainless Steel. This item has been restricted from sale in the following state (s): []