New to Hudson Bearings' extensive line of heavy duty air cargo ball transfers, the Air Cargo Interchangeable Flying Saucer Ball Transfer Unit combines discrete functionality with long-term reliability to meet material rolling and handling requirements in an airport setting. These American-made units contain multiple drainage weep holes and come in two sizes: FSBT 1 SS MW & FSBT 1-1/4 SS MW, capable of withstanding 120 lbs. (55 kg) and 275 lbs. (125 kg), respectively.