1-3/8"(35Mm) Id Heat Shielded Fire Thermo Armor Fire Sleeve Silicone, 5 Feet The thermal insulation Fire sets is made of glass fiber coated with silicone rubber. High-quality materials to protect good heat insulation and fire prevention sleeve hose wire fuel line. It is widely used to protect and bind fuel pipelines, hydraulic pipelines and oil pipes from high temperature, and to prolong the life of wires and hoses. ?Dimension??? Inner Diameter 1-3/8"(35mm), Length 5 Feet (1.5 m), fits 22AN for Oil Fuel Line. Note: the size is measured by manual ,there may not be very exactly ?Application??? Designed of standard silicone rubber coated fiberglass. Quality material to protect good heat insulation for hose wires fuel lines. Widely used to protect and bundling fuel lines, hydraulic and oil lines from high temperatures and to prolong the life of wiring and hoses ?Withstand High Temp???Operating Temp: -60 C degree - 260 C degree, Flammability: VW-1, Inner Sleeve: Fiberglass, Coating Material: Silicone ?Easy to Use???Easy to instal, Ideal for protecting hoses, electrical wiring, oil and fuel lines from heat and to prolong the life , helps to prevent vapor lock, protects wires from melting ?Lifetime Service??? BSTFLEX Lifetime Warranty! MSHA, -60 degree C Test, 260 degree C test, UL 1441 test, ROHS, REACH. Meets: *DIN EN45545-2:2020 Rail Certificateion*, *DIN 45545 Low smoke toxicity*, * DIN 54837/5510-2 Rail vehicle certificated for resistant to combustibility*,* NF EN ISO 11925-2 (15 AND 30 SEC)*, *TB/T 3138-2018 Technical specification of flame retardant materials for railway locomotive and vehicle*