[Material]: Made of ABS and stainless steel, it has good toughness, high strength, and durability. [Size]: 61 x 13.5 cm. Includes 4 different nozzles: a small 12mm round nozzle, a large 20mm round nozzle, a 35mm flat nozzle, and a large 56mm flat nozzle. [Design]: The handle design features a stainless steel push rod for smooth pushing and pulling. The injection gun uses the principle of a syringe instead of the traditional manual grouting technique to fill gaps with pressure. [Easy to Use]: The mortar is drawn into the injection equipment by vacuum suction, then the handle is pressed to quickly inject the cement mortar to the desired position. [Wide Application]: Decoration, construction, filling to prevent water leakage, mainly used for grouting during the installation of security and fire doors. Fill the portico, aluminum window frames, and cracks in the wall.