... Delivery 3. Experienced Staff Corrosion Resistant Dacromet Plated Chain: Why Choose Us ? 1. Hangzhou Donghua Chain Group Co., Ltd established in 1991, we ... ISO9001, ISO14001, ISO16969, AAA and API certificates. 1.Technical parameters Chain No.: 25DR, 35DR, 41DR, 40DR, 50DR, 60DR ~ 32BDRPitch: 6.350 ...