Product appearance: inside and outside wall is smooth Main Color: Blue / Red / Black I33T product line: include general car silicone hose, different types of radiator tube, Coupler & Turbo intercooler pipe, Intake piping, etc. I33T Brand introduction I33T Silicon Hose Store is a universal automotive silicone hose manufacturers, and have 15 years production experience. We provide high quality manually 3/4 layers of silicone products, and customize universal automotive (racing car & refitted car) replacement parts. Our products include general car silicone tube, different types of radiator silicone tube, Coupler & Turbo intercooler pipe, etc. Our silicone hose kits are designed with your engines cooling as a top priority. I33T high performance handicraft silicone hose is made with high-grade silicone and a dual layer, that consists of heat resistant fibers, increased pressure tolerance; resistance to UV, water, oil, fuel, heat reductions and a life time expectancy of the hoses. Our specific combination of silicone compounds and fabrics to deliver the required performance, reliability strength and flexibility required, improves the flow of engine cooling system and upgrades the performance.