Model b230188; serial number 04-15032-01. Bearing number # h-0017-18. Manufacturer airfloat systems, demirco industries, decatur, illinois. Phone 800-888-0018. Nameplate data says 4000 pound capacity and 2000 pound per station. Unit is 102" x 104" with foot controls for the compressed air and rotation. Unit uses compressed air to act as an air bearing and the unit rotates by hand or by air motor. Unit was retrofitted in 10-14-04 using kit # 180 with an air drive. Unit currently has a 180 deg stop on it but this can be removed so that the unit can rotate 360° or several turns. With the air for floatation, the loading plate raises approximately 1/2" to 3/4".