SH254 tubing can recover to approximately 1/4 of its expanded size when heated to its gel point (621°F- 625°F). Because of its exceptional shrinkage capability, its recommended that the outside diameter of the object to be shrunk down upon should not be more than 50% of the expanded I.D. of the size of the tubing used. Many sizes conform to AMS 3584 and MIL-I-23053/12 Class 5, MIL-DTL-23053/12, AMS-DTL-23053/12. SH254 is non-flammable, non-corrosive, and offers all of the other outstanding electrical, chemical, and mechanical properties of PTFE Fluoropolymer. Std. Color: Natural (Clear).