https://www.ebay.com/sch/i.html?_nkw=3M+Black+Heat+Shrink+Tubing+Pack+Of+20+&_sacat=0&_dmd=2

3M Black Heat Shrink Tubing (Pack Of 20)

Regular price
$377.00
Sale price
$269.00

Heat Shrink Tubing, Material Cross-Linked Polyolefin, Heavy, Temp. Range -67 Degrees to 230 Degrees F, Shrink Ratio 3:1, Black, Length 4 ft, Wire Range 12 to 6 AWG, I.D. Before Shrinking 0.400 In, I.D. After Shrinking 0.150 In, Wall Thickness After Shrinking 0.090 In, Shrink Temp. 250 Degrees F, Max. Voltage 1000V, Features Adhesive Lined, Standards UL Listed (UL 486D) File E-102356 and CSA Certified, Package Quantity 20