1" Bore; 1-3/16" Base to Center Height; 2.9" Nominal Bolt Center Across Shaft; 4 Bolt Pillow Block; Aluminum Housing; Ball; 2-1/2" Length Thru Bore; 0.22" Mounting Hole Diam; Yes Relubricatable; SUPER-16-DD; 2 Seals; Non-Adjustable; Yes Self Aligning