Mounted Ball Bearing Number of Bolts 4 Medium Duty Series Bore Dia 15/16 In. Ball Bearing Type Steel Bearing Material Cast Iron Housing Material Set Screw Locking Type Mounting Hole Center 3-1/4 In. Overall Height 1-21/32 In. Overall Width 4-9/32 In. Overall Length 4-9/32 In. Bolt Hole Size 3/8 In. Ball Bearing Insert Dynamic Load Capacity 4 400 lb. Static Load Capacity 2 540 lb. Temp Range -20 Degrees to 250 Degrees F Durable Paint/Black Oxide Finish Black