These Seachoice Brazed Non-Insulated Butt Splices let you connect two wires quickly and easily without soldering. The window allows for sure crimping, and the materials used ensure strength, durability, and reliable performance in the most demanding environments. These Marine-Grade Butt Splices feature 99.9% pure copper construction, with a tin-plated brazed-seam tube. They are for use with wire gauge #4 AWG, and are sold in packs of 25. Seachoice is committed to delivering quality marine accessories and OEM replacement parts to satisfy fishing, boating and watersports enthusiasts worldwide. Seachoice is run for and by boaters, offering a wide-ranging product line while remaining affordable.