https://dronestuffpro.com/product/150pcs-8-size-heat-shrink-tube-sleeve-wire-kit-with-box-for-rc-diy-model-tool-for-rc-drones-fpv-quadcopter-helicopter-aircraft/
150Pcs 8 Size Heat Shrink Tube Sleeve Wire Kit with Box for RC DIY Model Tool for RC Drones FPV Quadcopter Helicopter Aircraft