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Heavy-Duty Caulk Gun for Seamless Home Repairs and Projects. Durable Aluminum Alloy Construction: Made of high-quality aluminum alloy with 1.5mm wall thickness for rugged durability. Optimal 17:1 Thrust Ratio: Designed for easy control and perfect balance, suitable for high-density sealants. User-Friendly Sealing Design: Equipped with sealing perforator pin and plunger head to save adhesive material. Customized OEM/ODM Service: Supports customized branding and specifications for professional applications. One Year Warranty Coverage: Comprehensive one-year warranty with prompt solution support for any product issues. Efficient 310ml Capacity: Designed for seamless application with standard 310ml cartridge compatibility.