Maximum operating temperature: 175 deg. F. Brittle temperature: -40 deg. F. Material: Clear, nontoxic, FDA and NSF listed PVC compounds. Hardness: A. Durometer: 80 listed by NSF, glass-like clarity and smoothness, abrasion-resistant, handles a wide variety of chemicals, gases, and liquids, visual contact with material flow. Can be used as protective or insulating cover, drainage lines of all kinds. Bulk coils.