, labor saving, high efficiency; no overflow, no air leakage Whether you are a professional or casual DIYer, this caulking-gun will meet your needs aluminum alloy materials, strong and exhaust for to minimize the overflow of The rotatable tracheal joint makes the more free for easy caulking Pneumatic are mainly used in homes, factories, construction sites or other adhesives that can produce a sealing effect, Manufacturer: JAZUAIAO