Sierra Shields Nautiflex Corrugated Silicone Exhaust Hose 8 The Nautiflex Corrugated Silicone Exhaust 34 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 O.D. 9 764 or 231mm I.D. 8 or 203mm Wt. C 768 Bend Radius 4 x I.D. Appli