Both sheath and core are made of 100% high tenacity polypropylene, float on water and easy to handle. Together with high visibility color, good choice for water rescue application . Diameter 8 mm (5/16") 10 mm (3/8") Weight 28 g/m 51 g/m Tenacity 6 kN 11 kN Material PP PP Product code 4114121 (15m) 4114131 (15m) 4114128 (100m) 4114138 (100m)