Shields Shieldsflex II Series 250 Marine Water/Exhaust Hose, black synthetic rubber tube and cover with wire helix reinforcement between plies of synthetic cord, black, 4.50" ID, by the foot, 12.5 foot length or 50 foot coil. Resisitant to abrasion, odor permeation, and exposure to exhaust fumes, ozone, mild chemicals, antifreeze and saltwater. Used for engine intake and wet exhaust, especially for long lengths or bends. Also used for bilge pump and toilet intake/discharge, scuppers, and holding tank vent/pumpout. Temperature range -20 deg F to +200 deg F continuous, +250 deg F intermittant. Meets SAE J2006 Type R2 Standards.