... 3.competitive price 4.good quality roller chains in carbon steel and stainless steel.specifications:25,35,41,40,50,60,80,100 ... ,24B,28B,32B,40B,48B,56B,64B,72B.The straight side plate and heavy duty(reinforced) chains are also available.roller ... -saless service9)Mutual development,mutual benefits. American standard 50-1R stainless steel roller chain