"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. Block Size in. 1 1/2, Bolt Hole Shape Round, Bolt Hole Size in. 5/8, Dimensions L x W x H in. 5.12 x 5.12 x 2.02, Dynamic Load Capacity lbs. 3,571, Mount Type 4-bolt, Static Load Capacity lbs. 5,087."