Shrinkage Ratio:2:1 (will shrink to 1/2 its supplied diameter) Suitable for electrical insulation, wire bundling, colour coding, mechanical protection, wire/cable joints and daily repairs etc Comes with 560pcs heat shrink tube assorted in plastic box, 5 colors( Yellow, Blue, Black, Green, Red), 12 Specifications , satisfied for your different need Length: 45mm, Internal Diameter:1mm/1.5mm/2mm/2.5mm/3mm/3.5mm/4mm/5mm/6mm/7mm/10mm/13mm Colour: mixed color Material: PE Package Contents: 560 x Heat Shrink Tube Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Shrinkage Ratio:2:1 (will shrink to 1/2 its supplied diameter) Suitable for electrical insulation, wire bundling, colour coding, mechanical protection, wire/cable joints and daily repairs etc Comes with 560pcs heat shrink tube assorted in plastic box, 5 colors( Yellow, Blue, Black, Green, Red), 12 Specifications , satisfied for your different need Length: 45mm, Internal Diameter:1mm/1.5mm/2mm/2.5mm/3mm/3.5mm/4mm/5mm/6mm/7mm/10mm/13mm