Four Feet of 3/4" Clear HIX polyolefin heatshrink tubing. This is the most popular general purpose tubing used for insulating, jacketing, bundling and identification. HIX is mechanically tough, has -67?F (-55?C) to 275?F (135?C) operating temperature, shrinks to half its original diameter and has good abrasion/solvent resistance. The longitudinal shrinkage is less than 6%, it is SAE-AMS-DTL-23053/5, Class 1 & 2 complient.