101 Nylon per MIL-P-20693A+ for strength, fungus, chemical (oils, acids, solvents, alcohol, gasoline, hydraulic fluids), corrosion, shock, vibration resistant, it is non-magnetic, lightweight, and won’t support combustion. It’s non-abrasive smooth finish & rounded edges deter harm to item being held, eg. shorts. Use as a clamp, clip, hanger, strain relief, strap, fastener. Oper. Temp.: -60°F to +300°F.