Fire Sleeve solves the problem of heat and abrasions damaging fuel, transmission and brake lines and is a fireproof solution. Constructed from a high temperature resistant braided glass material, woven into a sleeve and heavily coated with 100% iron oxide silicone rubber, Fire Sleeve thermal insulator sleeve provides the ultimate in heat insulation and protection from direct heat up to 500F. Insulates wiring, hoses, oil / brakes / transmission lines & more Use for bundling & protecting hoses, electrical wiring, etc. Withstands 2000F of intermittent heat Size: 0.375 (3/8) inch x 25 feet Fitment Chart AN Conversion Chart AN Size Metal Tube O.D. Thread Size 2 1/8 in. 5/16 24 SAE 3 3/16 in. 3/8 24 SAE 4 1/4 in. 7/16 20 SAE 5 5/16 in. 3/8 18 SAE 6 3/8 in. 9/16 18 SAE 8 1/2 in. 3/4 16 SAE 10 5/8 in. 7/8 14 SAE 12 3/4 in. 1-1/16 12 SAE 16 1 in. 1-5/16 12 SAE 20 1-1/4 in. 1-5/8 12 SAE 24 1-1/2 in. 1-7/8 12 SAE 28 1-3/4 in. 2-1/4 12 SAE 32 2 in. 2-1/2 12 SAE Fire Sleeve Application Chart Part# Name Line Size* 10470 3/8 in. Fire Sleeve 3AN4AN6AN** 10472 5/8 in. Fire Sleeve 6AN8AN 10474 1 in. Fire Sleeve 10AN12AN16AN**5/8 in. Heater Hose3/4 in. Heater Hose *Braided Kevlar line was used in testing. You may notice a slight difference in size if you have Braided Stainless Steel lines. **Tight fit: If you have fittings on your line, you may need to order one size up. You can achieve between 1/16 in. and 1/8 in. stretch out of our material. This may help on installs with fittings already on the lines.