Nylon 66 (aka nylon 6-6, nylon 6/6 or nylon 6,6) is a type of polyamide or nylon. Nylons come in many types, and the two most common for textile and plastics industries are nylon 6 and nylon 66.
N 2038 (OTTO) Nylon 6/6 pellets Cas 32131-17-2 - used when high mechanical strength, rigidity, good stability under heat and/or chemical resistance