Make the water go where you want it to with the HandiFoam HT770 Premium Foam Gun. The heavy duty HT770 Gun provides precise bead control for filling and sealing under & between waterfall rocks with black waterfall foam. all-metal barrel dispensing unit designed for the professional contractor for frequent use. This gun allows for adjustable bead control, is solvent resistant, includes a non-stick teflonized basket and needle valve, increasing the longevity of the dispensing unit. Using the Gun Cleaner is highly recommended after using waterfall foam with this dispenser gun.