... with the drawing or samples. then we can give you a competitive price about it.1) Model: 428HV, 520HV, 525HV, 530HV ... (O-ring and X-ring)2) Colors available: natural, blue, nickel-plated, copper plated3 ... : 0086-317-2725281Foreigh sales Manager : Mr fu Mobile:(0) 18231799821 A grade 420- motorcycle chain