it can fit for using in bunching, stranding, cabling, extrusion and the armoring machine. It is manufactured according to the GB4004-83 ... ,JB/T7600-94,JB/T8137.1-3-1999, it is made with enhanced type punched and compacted iron plate, ... keep balance under high speed rotation; it can fit for using in bunching, stranding, cabling, extrusion and the armoring machine. flat bobbin for high speed machine