Sierra Shields Nautiflex Silicone Exhaust Hose 10 Sierra Shields Nautiflex Silicone Exhaust Hose has a blue silicone cover w smooth finish for easy clean up. The Nautiflex hose is flexible, easy to install and has four piles of synthetic fabric and remains stable at elevated temperatures. Specifications I.D. 10 or 254mm O.D. 10 38 or 264mm Wt. C 330 The temperature ranges from -20F - 350F Meets SAEJ2006 Type R1 and ISO 133632004 - Type 2 - Class B standards Applications Primarily used for straig