... of nylon monofilament and core line. big difference between right ang left zipper teeth,windingscrew, the machine ... Large feeding device that can bear the weighe of 25kg or more ,also we can change ... 4. Centerline feeding device can bear the weight of 5kg.And design for smooth, friction-free, ... -feeding device to improve the stablity of chain teeth. High speed nylon / plastic zipper making machine