California Proposition 65: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm. Rigid Shaft Coupling, 1 Piece Set Screw, Inch, Bore Dia. 1/2 in, 303 Stainless Steel, Finish Bright, Outside Dia. 1 1/8 in, Overall Length 1 3/4 in, Without Keyway, Screw Size 1/4 In. -20, Max. RPM 4, 000 RPM. This item has been restricted from sale in the following state (s): []