A spiral-reinforced tube of EPDM rubber is abrasion, heat, ozone, and sunlight resistant. Designed for professional contractor use. Engineered to stay flexible even in extreme temperatures from -40°F to 180°F. Virtually kink-proof. 500 psi burst strength, 150 psi working pressure. Crush proof machined brass couplers. 100' x 3/4" lengths come with reusable plastic reel. NOTE: SOME CATALOGS MENTION ALL 100' LENGTHS GET A RE-USABLE PLASTIC SPOOL. ONLY THE 100' X 3/4" COME WITH ONE.