Internal Diameter (in) 1/2 Length (in) 36 Wrap Material Aluminized Backed Thermal Fiber Wrap Color White underside Temperature Rating (degrees F) 800 Direct, 2000 Radiant Instillation Slip tubing, wiring, braided hoses etc... through the heat sheath to protect the items Thickness (in) 1/16 Quantity 1 heat sheath The Thermal Zero Aluminized Heat Sheath will help to keep what needs to stay cool, cool or the opposite. On one side we use the same thermal fiber material we use in out heat wrap and the flexible aluminum shielding material on the other side. Our heat sheaths are designed and produced right here in the USA. We double stitch the seam and even finish the edge of the seam so it will NOT look ugly and fray in your engine bay. Our wraps contain NO ASBESTOS.