... polypropylene yarn, polypropylene (commonly known as:polypropylene yarn, high-strength polypropylene) 350D-3500D coloredhigh-strength polypropylene yarn, because of their large axes, eachShaft ... kg anti-aging, acid, light, wearable, low thermalconductivity, resistance to seawater corrosion, does not absorbmoisture, breaking strength (strong) 7.8g / d, up ...