Kevlar mainly used in sewing the filter bags, protective clothing FR decoration high temperature resistant products.ect. Kevlar sewing thread Features: 1) Yarn counts: 10S, 18.5S, 20S, 25S, 30S, 35S, 40S 2) With various colors. 3) Good colors, high strength and excellent flame retardant 4) Mainly used in the production of protective clothing and sewing thread. A plastic bags per roll/carton, carton size:45*45*48cm.