https://www.banggood.com/270Pcs-3-1-Shrink-Ratio-Dual-Wall-Adhesive-Lined-Heat-Shrink-Tubing-Tube-3-or-8-inch-1-or-4-inch-3-or-16-inch-1-or-8-inch-3-or-32-inch-1-or-16-inch-2-Color-Kit-p-2015516.html
Only US$7.99, buy best 270pcs 3:1 shrink ratio dual wall adhesive lined heat shrink tubing tube 3/8
adhesive linedshrinkratiodualwall