Crush Proof Rubber Hose (NR-CP): our Crush Proof line of exhaust hoses are made for more rugged applications, and are suitable for short-term use with temperatures not exceeding 330° F. Should you require the use of our Crush Proof Hose for continuous-use operations the temperature is not to exceed 300° F. These hoses are offered 3″, 4″, 5″, 6″, and 8″ diameters, and in lengths of 8′, 16′, 24′, and 33′, with the exception being made for our 3″ diameter line of Crush Proof hoses whose available lengths are 8′ and 16′; and our 8″ diameter hoses which are offered in 16′ and 33′ foot lengths.