Woodstock W1118 1-7/8-Inch by 3/4-Inch Rub Collar Bore 1-7/8-Inch outside diameter by 3/4-Inch inside diameter All Woodstock rub collars are manufacutred from solid steel on CNC lathes These Rub Collars are assembled in the U.S.A using high-quality, maintenenace-free bearing