Dear customer: Thank you and congratulations on your choice. The difference between the cleaning free styrofoam gun and other foam guns is that you don't need to buy detergent, which saves you money. We are committed to developing and producing high-quality home improvement tools to improve the quality of life and work efficienc Specific product specifications: 1. copper head: the copper head makes the spray smooth without blocking. 2. Barrel: the barrel is covered with polytetrafluoroethylene, which is very easy to clean. 3. trigger: press the trigger to spray foam. 4. Valve: when in use, rotate downward to open the valve. After use, rotate upward to close. 5. inlet: connect and fasten the foam tank with the inlet. 6. Adjusting screw: rotate the adjusting screw to adjust and control the spraying speed of foaming agent. 7. ABS handle: hold the handle when applying foaming agent. Packing: equipped with a long plastic tube and two short sharp nozzles. Weight: 385g; Inner box size: 33 * 24 * 5.4cm; Applicable foam bottle size: outer diameter 40*3mm/ inner diameter greater than 18mm Flow outer diameter: 10mm Precautions: when blowing the foaming agent, turn on the switch on the foaming gun and pull the trigger. When stopping use, remember to turn off the switch first, and then continue to pull the trigger 4-5 times to finish blowing the remaining foaming agent in the barrel, so that it will not stick next time. Note: We do not have the foaming agent as a gift, please purchase the foaming agent by yourself. _x000D_