What this product is A kit of 530 polyolefin heat shrink tubes with a 2:1 shrink ratio, designed to provide reliable electrical insulation, mechanical protection and neat, long-lasting repairs for wires and cables. Key benefits — why you need it Protects and insulates: Creates a tight, protective sleeve over solder joints, splices and exposed conductors to prevent shorts and reduce wear. Organizes and identifies: Five colors (yellow, blue, black, green, red) make color-coding and quick identification of wires simple. Fits more jobs: Twelve different tube sizes accommodate a wide range of wire diameters; the 2:1 shrink ratio ensures a snug fit on uneven joints and bundled cables. Ready to use and easy to store: All pieces are sorted in a compact plastic box so you can find the right size and color quickly on the job. Features and performance Material: Durable polyolefin for reliable electrical insulation and abrasion resistance. Shrink ratio: 2:1 for secure, conforming coverage over joints and connectors. Quantity and variety: 530 tubes across 12 specifications, supplied in five colors (yellow, blue, black, green, red). Packaging: Organized plastic box for quick access and neat storage. Compatibility Works with most common wire and cable types used in electronics, automotive, marine, hobbyist and household wiring projects. The variety of sizes covers a broad range of conductor diameters and bundled cable assemblies. Typical use scenarios 1. Electronics repair: Insulate solder joints and repair broken headphone or USB cables to restore function and prevent short circuits. 2. Automotive and motorcycle wiring: Protect connections, repair damaged insulation, and color-code circuits during installations or maintenance. 3. Home and hobby projects: Bundle and protect wires for LED strips, RC models, small appliances, or DIY lighting projects. What’s in the box 530 polyolefin heat shrink tubes 12 size variations 5 colors: yellow, blue, black, green, red Compact plastic organizer box for easy selection and storage Quick usage tips Slide the correctly sized tube over the connection, apply heat evenly with a heat gun or lighter until it shrinks and conforms to the joint. Choose a tube slightly larger than the unshrunk diameter to allow full coverage; the 2:1 shrink ratio will provide a tight fit. This kit provides a practical, organized solution for protecting, identifying and repairing wires and cable connections across a wide range of everyday and professional applications.