Kuject CC270 Heat Shrink Butt Connectors, 270-Piece Copper Wire Kit

Adhesive-lined heat-shrink tubing helps seal a crimped wire joint against water and moisture, making the Kuject CC270 kit useful for wiring projects where a protected connection matters.

The 270-piece assortment includes four colour-coded connector sizes, so you can select a terminal to suit different wire gauges instead of relying on a single-size pack.

Working on a vehicle, boat or stereo connection? Crimp the connector onto the wire ends, then apply heat so the tubing shrinks around the joint.

Everyday use

These butt splice connectors join two wire ends inside a copper core, while the polyolefin insulation provides a heat-shrink outer layer. The adhesive lining forms a seal when the connector is crimped and heated, helping protect the connection from moisture and corrosion. The translucent tubing also lets you see the joint as you work.

The colour-coded assortment is suited to automotive, marine, boat, truck and stereo wiring tasks. For example, a home workshop project involving several wire sizes can draw from the same organized kit rather than requiring a separate pack for every connection. Match the connector to the wire gauge, crimp it securely, then heat the tubing to form the seal.

What you’ll notice day to day

The main convenience is having a range of sizes together in a storage box. Colour coding makes it easier to identify the connector you need, while the heat-shrink layer combines insulation and sealing in the joint. The seamless tube has a stop in the centre to keep the wire ends from passing through each other, supporting a straightforward butt-splice connection.

Buyers often highlight the size selection, ease of use and shrinking action. Feedback on durability and material quality is mixed, so careful wire matching and a secure crimp remain important steps when making each connection.

Key points

• Connector type: Butt splice
• Quantity: 270 connectors
• Core material: Copper
• Insulation: Adhesive-lined polyolefin
• White: 30 pieces, 26–22 AWG
• Red: 130 pieces
• Blue: 100 pieces, 16–14 AWG
• Yellow: 10 pieces, 12–10 AWG
• Maximum voltage: 30 volts

Final verdict

The Kuject CC270 is a practical fit for DIY wiring work that calls for several butt-splice sizes in one kit. Its colour-coded range helps with selection, and the adhesive-lined heat-shrink tubing provides a sealed finish for automotive, marine and other wire-connection projects where moisture protection is useful.