... tenacity,quality 2. meet all brand machines the fastest r.p.m 3.use for industrial closing machines 100% spun polyester sewing thread ... to meet all brands portable closers usages. 2. Industrial closing machines: Cone weight 1kg, 2.5lb, 2 kg, 4.5lb, 5lb ... , 5kg, 18lb, 9kg, 20lb & 10kg meet all brands industrial closing machines operations.** 18lb, 9kg, 20lb & 10kg bulk knotless bag closing threads ...