Polyester Filament Sewing Thread This thread has been produced using specially filament yarn with high strength,Website:http://www.wx-thread ... & Usage:NoSpecificationRegular LengthMain Usages1150D3000Y, 3500Y, 5000YSewing thread for nylon zipper, great clothes leather products ... 3500Y,5000Y6250D*23000Y, 3500Y, 5000Y7300D3000Y, 3500Y, 5000YSewing thread for leather, Leather shoes, Sofa,car cushion ...