conveyor gear 1,material:STEEL(1023/1045#) 2,the conveyor gear got ISO9001:2000 tory3,we are OEM conveyor gear factory Packaging Detail:Steel pallet ... per standard such as Metric standard, British standards, AGMA standards2.Material can be C45, 40Cr, 20CrMnTi, 42CrMo, copper, stainless steel and ... send you a sample as your request.duplex bossed sprocket conveyor precise couplings