... lengthmain usages29.5*2 (20s/2)3000M, 5000MJeans, shoes, caps, leather products. etc 29.5*3 (20s/3)2000M, 3000MJeans, shoes ... )3000M, 5000MJeans, handbags, sewing of keyhole and fastener, etc19.7*3 (30s/3)2000M, 3000M, 5000MTents jeans, leather products, shoes ect 14 ... .8*2 (40s/2)3000M, 5000MSuits, trousers, coats, Sewing of button-hole and ...