Special multi-line: 
Special multi-line, also known as high-strength polyester thread, silk light. Is one of the market's most regular, the most widely used varieties of sewing thread. 
Uses: For PVC, thicker fabrics. Mattresses, sofas, leather goods 
Features: shiny, inelastic, colored solid, cheap 
Size: 0 #, 5 #, 10 #, 20 #, 30 #, 40 #, 60 #, 80 #