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1. Housing material:PA
2. Tread material:TPE
4. Brake type:1.2 dirction locking 3. 3 direction locking
We designed this item castor base on the several decades experience in developing castor, it is high quality and graceful castors shape, the twin wheel are plump, , fluent line, strong locking setup, high load capacity, stable quality , durable wash, and portable control.