Multiple Sizes: 8 sizes: (inner diameter) 1.5mm, 2mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm. 5 Colors: Black, Yellow, Green, Red, Blue. Suitable for all kinds of wires and cables. Exquisite Material: These heat shrink tubing are made of polyolefin, waterproof, not easy to break or deform, durable, long-lasting, and shrink quickly, good electrical insulation, insulation of open wires and connected wires. These heat shrink tubing can provide strong protection for your wires and cables. Easy to Use and Shrink: These heat shrink tubing are very easy to use and shrink. Simply wrap your target wire and shrink it with a small hot air blower or a cigarette lighter. 2:1 shrink ratio, wraps wires of all shapes tightly and firmly. Widely Used: It can support you on electrical insulation, wire bundling, color coding, mechanical protection, wire/cable joints and daily repairs, etc. Can also be used for all phone charging cables and earphones. Package Contents: 530 pieces heat shrink tubes in 5 colors and 8 sizes, individually wrapped for each size, easy to store or carry. Shrinkage: 2:1 (shrink to 1/2 feed diameter) Quantity: 1 pack (164 pieces) Material: Polyolefin Minimum Shrinkage Temperature: 70C Full Shrinkage Temperature: up to 110C Operating Temperature: -55C to 125C Tensile Strength: 10.4 MPa Dielectric Strength: 15 kV/mm Shipped Quantity: 530 pieces Packing method: bag Color: colorful