About This Package Included: 532Pcs heat shrink solder seal wire connector kit includes 400Pcs 7sizes of solder wire connectors, 132Pcs 8sizes of black heat shrink tubing, 1Pcs Heat Gun (Including instructions for use), the included carry-on tool kit comes with an ergonomic handle for easy use and portability Heat Gun: Powerful 350W portable heat gun features a dual heat setting that reaches temperatures of 752°F (400°C) in seconds to quickly seal wires Easy to Use: No need for crimping tools and soldering machine, just strip the wires, insert the soldering sleeve and heat it up with hot air gun, soldering butt joints are completed in seconds, saving time and labor Waterproof and sealed: Low heat solder and hot melt adhesive butt connectors combined with heat shrink tubing can produce a perfect seal, which contributes to better waterproof and sealing performance for harsh environments, protecting wires from abrasion, corrosion and damage Application: Heat shrink wire connectors are designed for use in harsh environments to provide protection for wires and cables, widely used in marine, automotive, electrical and other outdoor projects Overview Connector Type : Butt Splice Terminal : Butt Terminal Material : Aluminum, Plastic Brand : Eoppen Temperature Rating : 0-400°C or 32-752°F