Proflow’s 400 series rubber hose is avalable in Black and is designed to be used with E85, diesel, methanol, coolant, oil, air, transmission fluid and vacuum. Its spiral synthetic yarn reinforcement allows it to be used up to 250 psi and its smooth synthetic rubber outer makes it perfect for automotive and marine applications. To ensure perfect fit, use Proflow 400 series fittings and adaptors. It is recommended that in high pressure and temperature applications, the use of a clamp may be required.