"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. Bolt Hole Size in. 5/8, Dimensions L x W x H in. 5.63 x 5.63 x 2.15, Dynamic Load Capacity lbs. 4,444, Mount Type 4-bolt, Static Load Capacity lbs. 6,044, Block Size in. 2, Bolt Hole Shape Round."