Foam Lance core is made of quality brass, which have adjustment function that allow you to dial-in the sprayer for any situation. Filling up the reservoir bottle with soap, click into your existing pressure washer lance or trigger, adjust the knob for your desired foam level, and sprayPerfect for car cleaning, windows washing, driveways, roofs, siding washing, it is best product for Detailing Trucks or SUVs.Requires Pressure Washer to Have 2.0GPM & Over 1000 PSI Pressure for use, Max Temp 60 Degree, Maximum Pressure 160 Bar, Maximum flow: 5.3Gpm, adjustable Snow Foam Lance with 1/4" quick disconnection fitting. Container Capacity: 1 Liter / 0.22 Gallon.Easy to use, fill some soap into the bottle with warm water to get thick foam, connect 1/4" quick connection plug to pressure washer gun or wand, adjust the knob on the top to desired foam level and then foam blaster will disperse thick foam.Adjustable nozzle for accurate mixing and foam generation. Turn the top knob right (-) to get the thickest miure, adjust the nozzle to get a proper sprinkle pattern, and let it loose.