200lb 100% Dupont Black or Yellow Kevlar Speargun Band Constrictor Cord, Low Stretch, Great Knot Retention (model rocket paracord heat tolerant up to 900 f, survival/tactical, high strength to weight) Our Kevlar(R) Constrictor is superior because of its inherent low stretch and knot holding characteristics. No melting required simply tie an extra constrictor knot and trim it flush for a clean finish. FIBER TYPE: 100% DuPont Kevlar(R) fiber with clear synthetic finish DIA: 1mm LEN: (select) TENSILE TEST: 200lb (See important notes about tensile strength and appropriate applications in main description) HEAT RESISTANT TO 900+F - Great parachute cord for model rockets, fire poi and sewing thread for welding garments. SURVIVAL/TACTICAL/OUTDOORS: Fishing line, tent stays, snares and gear repairs. A small coil in your pocket saves the day in 1000 different ways.