Shan Dong Finer Lifting Tools co., LTD Welcome You visit our website. We are Air Bearing Casters professional manufacturer with durable quality, export to more than 50 countries from the year of 1998. Air Casters specializes applied in moving heavy loads with any shape and any loads, move heavy-duty loads with safer and easy. Air bearing casters power source is compressed air, with no spark and no pollute the environment.