For engine intake, critical water, drain, scupper bilge & sanitation uses. Extra heavy tube and cover with helix between 2 ply reinforcement provides excellent flexibility and bend radius. Resists heat, ozone, exhaust, sani chemicals, panting and collapse. Exceeds New (SAE J2006, ABYC and NMMA) Stds. Black High Temp EDPM Rubber 250°F (121°C). 5 Year Warranty. ID 1-1/8" Length Per Foot