"This NorTrac pillow block features solid cast housing and top-quality advanced seals designed to prevent leakage and keep out dirt in your hydraulic application. Static Load Capacity lbs. 4,424, Mount Type 4-bolt, Block Size in. 1 3/8, Dynamic Load Capacity lbs. 3,062, Dimensions L x W x H in. 4.61 x 4.61 x 1.75, Bolt Hole Shape Round, Bolt Hole Size in. 5/9."