High quality material The gun body is made of ABS and stainless steel, which has good toughness, high strength and long service life. High-density push rod, wear-resistant, non-deformable rubber plunger, easy to push cement. Comfort handle The handle is sturdy, easy to grip, easy to push and pulling (sealing armored doors, sealing tile, sealing cement, absorbing grout, etc.). Uses: security compression doors, door frames , dismantling aluminum bed frames, sealing joints in large water areas, sealing large water conservation projects, sealing highway joints, etc. Note: 1. If the resistance is too great during the first use, you can drop a few drops of oil between the rubber stopper and the pipe wall. 2. Please rinse with clean water after use to prevent the cement sludge from remaining in the gun main body after drying. 3. After cleaning, put a few drops of oil on the handle, pull it several times, it is easier to store, and the effect will be better next time. Package includes: gun body - 610 x 135mm, 4 different nozzles - 12mm small round tip, 20mm round neck, 35mm flat neck, 56mm neck, 1 spare rubber plunger.