... 100% spun polyester sewing thread 12/4 Weight/cone: 200~250g, 8oz, 1~10kg, 4.5~20lb1)high quality Spun Polyester Bag Closing ... Threads without any knot.2) Our max cone weight can ... meet all brands portable closers usages. 2. Industrial closing machines: Cone weight 1kg, 2.5lb, 2 kg, 4.5lb, 5lb, 3kg, 4kg, 5kg, 18lb ...