... single duplex and triple)20A10-100, 40A10-100, 60A10-100, 80A10-100, 100A10-100. 20B10-100, 40B10-100, 60B10-100, 80B10-100, 100B10-100Payment,minimum order ... advance, 70% balance before shipping). Minimum order is 100 pcs. Delivery time is 20-30days after receive deposit ... range of precision in house machining capablities.4.Industrial roller chain of sprocket style are simplex, duplex , triplex and ...