Description: 328pcs of assorted heat shrink tubing in 5colors and 8 Specifications satisfied for your different need. Shrinkage Ratio: 2:1 (will maximum shrink to 1/2 its supplied diameter) Suitable for electrical insulation, wire bundling, colour coding, mechanical protection, wire/cable joints and daily repairs etc. Internal Diameter: 1mm/2mm/3mm/4mm/6mm/8mm/10mm/14mm Operating Temperature: -55 °C to +125 °C; Minimum Shrinkage Temp: +70 °C ; Full Shrinkage Temp: +110 °C Maxi Specification: Material: Polyolefin Size Chart: Quantity x Inner diameter x length 120pcs x 1.0 x 40mm(Yellow?Black?Red?Green) 60pcs x 2.0 x 40mm(Yellow?Black?Red?Blue) 32pcs x 3.0 x 40mm(Yellow?Black?Red?Green) 32pcs x 4.0 x 40mm(Yellow?Black?Red?Blue) 32pcs x 6.0 x 40mm(Yellow?Black?Red?Green) 20pcs x 8.0 x 80mm(Yellow?Black?Red?Blue) 16pcs x 10.0 x 80mm(Yellow?Black?Red?Green) 16pcs x 14.0 x 80mm(Yellow?Black?Red?Blue) Total: 328pieces Package Includes: 328 Pieces Insulation Heat Shrink Note: You should keep about 1 cm distance when you use the lighter to shrink the tube, because it is easy to leave a black mark