Heating hose technology • GN800 and GN850 handguns are developed for manual applying of the hot melt materials to horizontal surfaces either in bead or spray form. GN800 and GN850 handguns must be used with a balancer, which compensates the weight of the handgun, prevents it from falling, and allows the use of both hands after the application of the hot me It. With the cordset connection, GN800 and GN850 handguns can be easily mounted to standard automatic hoses. GN800 and GN850 Series Handguns are 100% compliant with piston pump and gear pump melter systems of leading manufacturers. Technical Information