CA550HD F17 Agriculture Chain 1. 40Mn, 45Mn quality alloy steel 2. carbonized harden 3. competitive price 4. trend to long CA550HD Agriculture Chain with F17 attachment.We manufacture all kinds of Agricultural chain with attachments .CA550-A627...38.4R,38.4V...38.4VK1,38.4RK1F1...CA550F2,CA550K1F1...The non-standard chains according to customers' drawings. SPECIFICATION:PACKING: CA550HD F17 ...