Sierra Shields Nautiflex Silicone Exhaust Hose 1-1/4″SierraShields Nautiflex Silicone Exhaust Hose has a blue silicone cover w/ smooth finish for easy clean up.TheNautiflex hose is flexible, easy to install and has four piles of synthetic fabric and remains stable at elevated temperatures.Specifications:O.D.:1 5/8″ or 41mmI.D.:1 1/4″ or 32mmWt. “C”:41.3The temperature ranges from -20F – +350FLength:3′ or .9mApplications:Primarily used for straight connections in the wet exhaust system & engine water circulation lineMeets SAEJ2006 Type R1 and ISO 13363:2004 – Type 2 – Class B standards