Compatible Machine Model : ALL EXERCISE BOOK BINDING MACHINES.Galvanized Iron with copper plating. Having good corrosion protection. Due to Eco-friendly surface coating will not affect its quality and hence its promises a long and durable shell life. Because of proper winding, it will not break during running period due to any jerks/stoppage/heavy loads. Its thickness is 0.52 mm (26 Gauge) winded on high grade plastic reel. Weight of our wire spools is 15 Kgs each.