Roller Ball Transfer Bearings CY-19A Flange Mounted 3/4 inch Ball Bearing Roller Casters 55lb Load Capacity. Featuring two screw holes in each bearing surround for solid attachment to the worktable or workbench. (Set of 16) Features 1.Ball Transfer Unit are omni-directional load-bearing spherical balls mounted inside a restraining fixture. 2.360 universal transfer bearings is suitable for curved work created on band saws and router tables. 3. 3/4 inch diameter ball bearing roller is perfect. With a load bearing capacity of 55 lbs each. 4.Roller Ball Transfer Bearings are made of carbon steel, rustproof and corrosion resistant. 5.Two screw holes in each bearing surround for solid attachment to the worktable or workbench. 6.Widely used in transmission system, feeding system, processing system, processing machinery and packaging machinery auxiliary equipment. Specifications: Material: Carbon Steel Model: CY-19A Capacity(Max.): 25kg/55lb Ball Diameter: 18mm / 0.7-inch Mount Hole Dia: 4mm/0.16-inch Mount Hole Distance: 43mm/1.7-inch Dimension: 53 x 24 x 18mm/2.1 inch x 0.95 inch x 0.7 inch Package Included: 16 x Ball Transfer Unit Note: These Ball Transfer Units are used for transporting flat, smooth objects such as trays. It is not suitable for transporting stuff which has uneven or soft bottom surface such as cloth wrapping. It can not be used as swivel caster to move on the floor.