SIZE: -16B 5/8 inch diameter ball bearing roller. FEATURES: Universal transfer bearing. CAPACITY: With a load bearing capacity of 33.07 lbs. NOTE: Two screw holes in each bearing, screws are not included. 1. Ball Transfer Unit are omni-directional load-bearing spherical balls mounted inside a restraining fixture. 2. 360 universal transfer bearings are suitable for curved work created on band saws and router tables. Product Name: Ball Transfer Unit Weight: 260g Model: -16B Capacity (Max.): 15kg / 33.07lb Ball Diameter: 5/8-inch Dimension: 45 x 19mm / 1.8-inch x 0.75-inch (Max. D * H) Mount Hole Dia.: 4mm / 0.16-inch Mount Hole Distance: 30mm / 1.2-inch Color: Silver Material: Carbon steel Package Contents: 10 x Bearing Steel Roller Ball Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. Measurement allowed error is +/- 1-3cm.