Premium Materials: The body of the gun is made of premium thick stainless steel. Wear-resistant, shock-resistant, high strength and prolong service life. Super Suction: The new premium rubber piston is perfectly matched with the stainless steel gun body, which allows to the mortar syringe to have low resistance and strong suction power, which makes it easier to absorb the cement New design: Newly designed round nozzle, nozzle diameter can be cut to 4-14mm, and the small white nozzle can also be replaced to meet your different needs. Particularly suitable for grouting floor tiles. Size and Application: Gun Body: 620 x 65 mm, round mouth: 4-14 mm, flat mouth: 42 x 15 mm, large flat mouth: 60 x 20mm. It is suitable for ordinary mortar, epoxy resin, etc.