We offer a variety of pillow block bearings and flange bearings for most brands and models of fitness equipment. This Pillow Block Bearing is designed to work with Stepmills including Nautilus SM916 and Stairmaster SM 916. Also works with Stairmaster 7000PT and SM5 150005. Compatible with OEM# SM20012. See also our Hardware Kit for Pillow Block Bearings, part #SML162.