Marshall Excelsior Thermoplastic Hose. Flexible thermoplastic UL and CGA approved hose. Rated up to 350 psi working pressure with a 400 pound pull test rating. Each hose comes with two ends and fully crimped brass ferrules. 1/4 inch hose ID. All Marshall Excelsior hoses are suitable for high or low pressure applications. 1/2 inch female flare swivel x 3/8 inch MNPT. 36 inch overall length.