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 Round, Bore Diameter 1 5/8 in, Bore Thread Size Not Applicable, Collar Outside Diameter 2 5/8 in, Inside Height to Flat Not Applicable, Clearance Diameter 2.94 in, Collar Width 11/16 in, 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 item has been restricted from sale in the following state (s): []