1. Fast contraction, no tape needed, water and electricity resistant, non-flammable material, safe and durable. 2. Insulated, waterproof and closely fitting, convenient for wire connection. 3. Contracts when heated, the internal solidified glue melts, making the wiring tight and waterproof. 4. User-friendly design, convenient for connection and easy to operate. 5. Please use a heat gun or lighter for contraction; low-power hair dryers cannot reach the required temperature and thus cannot achieve contraction. 6. Material: New PE material
