https://www.ebay.com/sch/i.html?_nkw=3M+Itcsn+3000+48+Bulk+Shrink+Tubing+3+In+Id+Black+4+Ft+Pk+20&_sacat=0&_dmd=2

3M Itcsn-3000-48-Bulk Shrink Tubing, 3 In Id, Black, 4 Ft, Pk 20

Regular price
$1,012.00
Sale price
$749.00

Heat Shrink Tubing, Material Cross-Linked Polyolefin, Heavy, Temp. Range -67 Degrees to 230 Degrees F, Shrink Ratio 0.13, Black, Length 4 ft, Wire Range 600 to 1250 kcmil, I.D. Before Shrinking 3.000 In, I.D. After Shrinking 1.000 In, Wall Thickness After Shrinking 0.170 In, Shrink Temp. 250 Degrees F, Max. Voltage 1000V, Standards UL Listed File E-102356 and CSA Certified, Package Quantity 20