Proflow’s 420 series industrial style, textured rubber hose is available in black only and is designed to be used with E85, diesel, methanol, coolant, oil, air and transmission fluid. Its outside layer is constructed from a wrapped chlorinated polyethylene which allows it to be used in applications of up to 270psi and has a slightly better temperature resistance compared to our traditional 400 series hose. To ensure a perfect fit, use Proflow 400 series fittings and adaptors. It is recommended that in high pressure and temperature applications, the use of a clamp is required. Not suitable for submersible applications.