Brake Roller / Speed Controller Dia.:80mm,92mm,120mm Material: nylon, zinc-plated Load Capacity: 500KG, 800KG, 1000KG ... Roller manufacturers in China.Brake Roller Series: Dia.:80mm, 92mm, 120mm, TandemMaterial: nylon, zinc-platedLoad Capacity:500KG, 800KG,1000KG, 1500KGCheck ... capacity. We have Dia. 80mm, Dia. 92mm, Dia. 120mm and tandem models for different installation requirement. OEM service is ...