Material: tygon, heavy-duty and durable to use | Corrosion resistant fuel line, also resist hardening and low temperature, No Metamorphose | Total 20 feet length including 4 sizes(5 feet each), satisfy most you need | No compatible with greater than 10% ethanol fuel | Apply Chainsaws, blowers, pressure washers, Weed Whackers and trimmers and many other 2 cycle gas engine machines