Hangzhou Perpetual Machinery & Equipment Co., Ltd.Is a professional work on industrial chain and sprocket business of the company.We have you need all the kind of the transmission products.Its main products are Standard roller chains, stainless steel chains, high quality agricultural chain Conveyor chains, special chains and sprocket etc.We can do ANSI, BS, DIN standard products.Welcome any customer contact to us, we will reply any request as soon as possible.Our company's quality policy is that it's our eternal pursuance to lead and satisfy customers's demand.