... quailty certification OEM sevice Brief Description of Znic Coated Sprocketznic coated sprocket for motorcycle;znic coated gear for motorcycleChain415,415H,420,428,428H,520,530 ... , Europe, etcProcessing Technic of Znic Coated Sprocket1) Heat Treatment: High frequency hardening on the teeth for 1045 steel Carburization for 1023 steel (plain iron ...