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, Bolt Hole Shape Round, Dynamic Load Capacity lbs. 3,062, Block Size in. 1 3/8, Mount Type 4-bolt, Dimensions L x W x H in. 4.61 x 4.61 x 1.75, Bolt Hole Size in. 5/9.