PTFE is the ultimate hose material. It has outstanding resistance to chemicals including alcohol fuels such as methanol, ethanol, E85 and leaded fuels such as race gas. It is also suitable for brake, transmission, clutch, power steering, and coolant. PTFE hose has ~zero~ permeation and will not emit vapors like rubber fuel hose, so it is safe to use in confined spaces such as a vehicle’s trunk or small garage. All Radium Engineering PTFE hoses have been successfully tested in-house to 1200psi although PTFE can typically withstand 2500psi+. They are also for extreme temperatures (-94F to +480F). They feature an extruded PTFE (fluoropolymer) core wrapped in a stainless steel wire braided sleeve. The outer coating for the universal DIY ends is braided PET. All hose ends are type-II black anodized aluminum.  Hose Dimensions 6AN: 0.33" ID/0.50" OD8AN: 0.42" ID/0.60" OD10AN: 0.51" ID/0.70" OD PTFE DIY KITS These kits are available in a few sizes. PTFE hose used in the universal DIY kits uses a black polyester outer braid.  Each kit includes the following: -Black braided PTFE hose, 14.75ft (4.5m)-Black PTFE hose end, straight (x 2)-Black PTFE hose end, 45 degree (x 2)-Black PTFE hose end, 90 degree (x 2) PTFE HOSE ENDS These hose ends are specific to PTFE hose and cannot be used with rubber hose. Each fitting is machined from aluminum and anodized black. Internal O-rings permit swivelling. Instruction PDF