High-quality materials: The gun body is made of thick, high-quality stainless steel. It is wear-resistant, impact-resistant, high-strength, and designed to prolong service life. Super suction power: The new high-quality rubber plunger is perfectly matched to the stainless steel gun body, providing low resistance and high suction power, making it easier to draw in cement. New design: Features a newly designed round nozzle with a diameter that can be cut to fit sizes between 9-14 mm. Nozzles are replaceable to suit various applications. Particularly suitable for grouting floor tiles. Size and application: Gun body: 660 x 140 mm, round nozzle: 9-20 mm, flat nozzle: 58 x 14 mm, large flat nozzle: 52 x 19 mm. Suitable for use with ordinary mortar, epoxy resin, and similar materials. This is a new high-end stainless steel caulking gun, engineered based on automotive piston principles, delivering high suction, high working efficiency, ease of operation, and long-term durability. Practical tips: 1. If the sand-to-cement ratio is incorrect, it may cause strain. Adjust by reducing the amount of sand. 2. Drawing material at a 45-degree angle is more efficient than vertical extraction. 3. For cleaning, remove the handle and nozzle before the material dries. Soak in water for 10 minutes. After cleaning, apply a few drops of oil and move the handle back and forth to ensure smooth operation for future use.