Ramair silicone hoses are made using the highest German grade silicone compound and are manufactured in 4-ply with a 5mm wall thickness to give you the strength you need from your silicone hose. The hose is suitable for a number of applications including air, water, coolant, and many other non-petrol chemical fluids. The hose is available as standard in black, blue and red. Component Type -Silicone Reducing Hose Logo -No logo (some stock may have a single white Ramair logo) Length -127mm (5") approx Colour -Select from menu Internal Diameter -Select from menu Wall Thickness -5mm Material -4-Ply Polyester Reinforced Silicone.