Blue universal straight section 4 ply silicone hosing 80mm inside diameter specifications inside diameter 80mm outside dia 90mm length 250mm wall thickness 5mm colour blue material silicone we offer a range of high quality blue silicone hoses for anyone who want to construct their own induction system or modify their original one the hoses are available in a wide range of diameters the hose will not be affected by the conditions in the engine bay