The MRN-4-1 Gravity refueling kit is designed to meet the harsh needs of refueling and military refueling needs. The nozzle kit is a compact commercial off the shelf, single refueling nozzle with four interchangeable spouts with a genderless hose connection point in a compact carry case with fuel resistant foam inserts.

Originally designed for helicopter refueling the nozzle kit can also be used for land based fuel supply trucks. The nozzle assembly can convey a wide variety of fuels. The spout and coupling are compliant and contain no reactive materials for use with Petroleum, Oil, and Lubricants ( POL), Petroleum Aviation Fuels, Marine & Automotive Unleaded and Diesel Fuels, Oil Based Fluids Salt Water and Fresh Water.