530pcs/set Heat Shrink Tubing Insulation Shrinkable Tube Assortment Electronic Polyolefin Ratio 2:1 Wrap Wire Cable Sleeve Kit Specifications: Material: Polyolefin Shrinkage Ratio: 2:1 (will maximum shrink to 1/2 its supplied diameter) Minimum Shrinkage Temp: ≥84°C Full Shrinkage Temp: ≥120°C Operating Temperature: -55°C to +125°C Tensile strength: 10.4 Mpa Dielectric strength: 15 KV/mm Manufacture specification: ISO9001 Flammability: Flame Retardant Approvals: UL Approved Supplied format (round or flat): Product is supplied flat Cutting method: Scissors or sharp knife Package size: approx. 190*130*36mm/7.48*5.11*1.41'' (Quantity+Diameter+Length+Color) 80pcs x 1.5 x 45mm Yellow 80pcs x 2.0 x 45mm Blue 80pcs x 2.0 x 45mm Black 60pcs x 3.0 x 45mm Green 50pcs x 4.0 x 45mm Red 50pcs x 4.0 x 45mm Black 30pcs x 5.0 x 45mm Black 20pcs x 6.0 x 45mm Yellow 20pcs x 8.0 x 45mm Red 20pcs x 10.0 x 45mm Green 20pcs x 10.0 x 45mm Blue 20pcs x 10.0 x 45mm Black Please note: It is manual measurement, there may be 2-3mm error. And item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.hope understanding.