High-quality Material: Constructed from superior copper conductor with a tin-plated , these wire butt connectors feature PVC insulation for enhanced performance and durability. Ideal for ensuring a secure and reliable electrical connection in wiring projects. Flared Insulation Design: The flared barrel design of these insulated butt crimp connectors facilitates easy wire insertion, minimizing installation time and enhancing usability in tight spaces. Perfect for efficient wire splicing with a professional . Wire-stop Structure: Each connector is designed with a wire-stop structure that helps in accurately positioning the wires, ensuring optimal compression and connectivity. This feature is crucial for maintaining the integrity of electrical circuits in automotive and home applications. Versatile Crimp Connectors: These connectors allow for the crimping of multiple different conductors within a compact space, making them suitable for a wide range of applications including automotive, home improvements, scientific projects, and car stereo installations. Comprehensive Kit: The package includes 200 pieces in total, with 90 red connectors for 22-16 AWG wires, 80 blue connectors for 16-14 AWG wires, and 30 yellow connectors for 12-10 AWG wires, covering most needs for wire gauge specifications in setups. Note: The color of the plastic box is random, no specified color is accepted Colour:Photo Color Material:Plastic + copper Package Contents: 200 x tubular fully insulated terminals Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.