Estone&reg; 280pcs Assortment Ratio 2:1 Heat Shrink Tubing Tube Sleeving Wrap Kit with Box Big collection of heat shrink tubing, 5colors, 8 Specifications, 280pcs 5 Color: Yellow, Blue, Black, Green, Red Supplied internal diameter: 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm Fully shrunk internal diameter: 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm Shrinkage Ratio: 2:1 ( will maximum shrink to 1 / 2 of its supplied diameter )