Features: Material: Made of polyolefin, shrinkage ratio: 2:1 (will shrink to 1/2 of its original diameter) Suitable for electrical insulation, wire bundling, color coding, mechanical protection, wire/cable joints, and daily maintenance Includes 164 heat shrinkable tubes in 5 colors (yellow, blue, black, green, red) and 8 sizes to meet various needs Length: 40mm or 80mm; Diameter: 1mm, 2mm, 3mm, 4mm, 6mm, 8mm, 10mm, 14mm; Shrink ratio: 2:1 Specifications: Material: Plastic Weight: 40g Size: As shown in picture Shrinkage Ratio: 2:1 Operating Temperature: -55C to +125C Minimum Shrinkage Temperature: +70C Full Shrinkage Temperature: +110C maximum Tensile Strength: 10.4 MPa Dielectric Strength: 15 kV/mm Note: 1. Please allow 1-2 cm errors due to manual measurement. Ensure you are comfortable with this before ordering. 2. Due to differences in monitor displays, the actual item color may vary slightly from the image. Package Includes: 60 pcs 1.0x40mm (Yellow, Black, Red, Green) 30 pcs 2.0x40mm (Yellow, Black, Red, Blue) 20 pcs 3.0x40mm (Yellow, Black, Red, Green) 16 pcs 4.0x40mm (Yellow, Black, Red, Blue) 12 pcs 6.0x40mm (Yellow, Black, Red, Green) 10 pcs 8.0x80mm (Yellow, Black, Red, Blue) 8 pcs 10.0x80mm (Yellow, Black, Red, Green) 8 pcs 14.0x80mm (Yellow, Black, Red, Blue)