... main products. 2.International Approval: ISO9001 3.Alloy steel ,with heat treatment. Lumber conveyor chain with kinds of sizes up to your ... - 940 (pitch: 12.7mm), C16AF1, C16AF2, (pitch :25.4mm)C60F2,60-910, 12BF3(pitch : 19.05mm)...It's used in lumber ... .It's strictly produced by ISO/ANSI/DIN standard. Silent chain,leaf chain,roller chain,special chain,sprocket,couplingare also our main products.