There are many materials caster, the most common materials are: economic and durable nylon casters, caster good quality polyurethane, rubber, cast iron and other materials. Widely used in mining, machinery equipment, electronic equipment, medical equipment, construction and decoration, textile, printing, furniture, logistics equipment, storage, working vehicles, chassis, cabinets, equipment, machinery, clean room, production line, supermarkets and many other industry and various fields. Two active caster. Caster Caster is called, its structure allows 360 degree horizontal rotation. Caster is referred to, including Caster and fixed casters. Fixed castors not rotating structure economical and durable casters _ _ Wheels positive Tong machinery supplied by Ning County is Tong Machinery Plastic Co., Ltd. Ning County is Tong Machinery Plastic Co., Ltd. (www.dzztjx.com) strong, credible, in Dezhou's plastic industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead positive Tong machinery and you hand in hand into the brilliant, for a better future!