User-Friendly: Before use, please read the operating manual carefully Also, remember to release air and foam pressure for first use and any maintenance, and clean foam immediately after every use ErgonomicS Design: Selected from ergonomics for long use The distance between handle and the knob have been adjusted for more comfortable Use: Our foam dispensing is perfect for sealing, filling, and insulating small gaps in door, bathtubs, air conditioning hole, and more : Our foam allows you to adjust the rate and dispense foam, making your work more efficient PTFE Coating: The expanding foam is cover with PTFE, easy to clean and foam from spilling, Manufacturer: Oxxggkao