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Product Introduction
Each style has 3 type tread material DIK:Rubber;grey;cone ball bearing. DYK:Rubber;black;electric conductive;cone ball bearing. PJP:Thermoplastic rubber ;precision ball bearing; housing made of zinc-chromatised pressed steel; double ball bearing swivel head; wheel axle with nut; wheel center made of zinc-chromatised steel or PP with threadguardsFor hospital bed or other applications