SKF® Pillow Block Housing, Series: SAF, 4-7/16 in ID, 6 in Base to Bore Centerline, 18-3/8 in Overall Length, 8-1/4 in Overall Width, 11-5/16 in Overall Height, Compatible Bore Diameter: 4-1/2 in, 4-7/16 in, Compatible Bearing Type: Spherical Roller Bearing, 16 in Bolt Center-to-Center Length, 5-1/4 in Base Width, Cast Iron