Features Nylon Construction: Made from non-flammable, waterproof nylon, ensuring reliable electrical isolation and long-lasting performance for all your wiring needs Effective Heat Activation: The tubing shrinks easily with heat, activating the internal adhesive for a tight, waterproof around wires and connections Versatile Color Options: Includes 4 colors—yellow, black, red, and green—in various sizes to accommodate diverse applications and enhance organization Features: 1、Nylon sleeve outsourcing, no tape, waterproof and electrical isolation, non‑flammable material, reliable and . 2、It shrinks by heat, the internal solidified glue melts, and the wiring is tight and waterproof. 3、With yellow, black, red, and green different colors and different size, can meet the needs of daily use. 4、It shrinks quickly at low temperature, lighter, heat gun can both make it shrink. 5、Has high strength and toughness, can be bent arbitrarily after heat shrinking. Specification: Item Type: Heat Shrink Tubing Kit Material: Nylon Uses: Electronic Components, Circuit Wiring Harness, Wire Connection Repair, Data Line (Small Head) Repair, Household Goods Line Repair Heat Shrinkage Ratio: 2:1 Size and Quantity: 1 x 40mm/0.04 x 1.57in (Yellow, Black, Red, Green), 120pcs 2 x 40mm/0.08 x 1.57in (Yellow, Black, Red, Green), 60pcs 3 x 40mm/0.12 x 1.57in (Yellow, Black, Red, Green), 32pcs 4 x 40mm/0.16 x 1.57in (Yellow, Black, Red, Green), 32pcs 6 x 40mm/0.24 x 1.57in (Yellow, Black, Red, Green), 32pcs 8 x 80mm/0.31 x 3.15in (Yellow, Black, Red, Green), 20pcs 10 x 80mm/0.39 x 3.15in (Yellow, Black, Red, Green), 16pcs 14 x 80mm/0.55 x 3.15in (Yellow, Black, Red, Green), 16pcs Package List: 328 x Heat Shrink Tubing Package List 328 x Heat Shrink Tubing