Sierra Shields Nautiflex Corrugated Silicone Exhaust Hose 1 The Nautiflex Corrugated Silicone Exhaust 1 Hose two ply construction, has wire captured between fabric plies. The hose features a blue silicone tube and cover with a smooth finish for easy cleaning. It also features wire reinforced that will not collapse under suction or in a bend. The corrugated cover allows the hose to bend for easy installation. Specifications I.D. 1 or 25mm O.D. 1 2764 or 36mm Wt. C 42 Applications Primarily used f