Amazon.com: Heat Shrink Tubing 328pcs Wire Wrap Cable Sleeve Assortment Ratio 2:1 Electric Insulation Tube - MultiColor : Electronics
Amazon.com: 134 pcs Red Black Dual Wall Heat Shrink Tubing Kit 6 Size Heat Shrink Tubes Wire Wrap Ratio 3:1 Electrical Cable Sleeve Assortment with Storage Case for DIY Long Lasting Insulation