Features: Environmentally friendly heat shrink insulation sleeve with a 2:1 shrinkage rate can achieve safe cable management. Quality polyolefin, it has excellent insulation and wear resistance. Easy to use, simply slide the heat shrink tubing onto the connection point and heat it up. Heat shrink tubing is very suitable for organizing and protecting wire or repairing under various flight conditions. Not only can it protect your cables, but it can also add unique touch to your flying equipment. Specifications: Material: polyolefin Quantity: 127pcs/bag, 164pcs/bag, 328pcs/bag, 530pcs/bag(optional) Bag Size: about 9x5cm/3.54x1.97" Shrinkage Ratio: 2:1 Package Includes: 1 Bag Heat Shrinkable Insulation Sleeve(127/164/328/530pcs per bag) note: Due to manual assembly, there may be slight differences in quantity. Please understand! Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.