INSIZE Roller Bearing V-Block Set These precision made V-Block Sets are designed to hold round material, and are suitable to hold heavy workpieces. With a Runout accuracy of 197µin and Parallelism of bearings to bottom at 472µin, your workpieces will not get damaged due to mis-aligned bearings. Features include... Overall Size: 9.1" x 3.9" x 5.9" Load Capacity: 2200 Lb Product Dimensions... Diameter of Bearings ( D ): 2.83" Range of Shafts ( d ): 2.76" - 7.87" W1: 2.36" W2: 3.15" h1: 1.18" h2: 4.88" h3: 0.79" L1: 7.09" L2: 3.54" S: 4.72"