Conduit, Sheathing, Protective, Extra Flexible, SST. Used to cover .25,.38 and .56 HP and UHP tubing. The .25 Conduit utilizes the 20422970 Brass Ferrule, .38 Conduit Utilizes 10083897 Brass Ferrule and the .56 Conduit utilizes the 05131347 Brass Ferrule (Brass Ferrules ordered Separately) KMT GENUINE PART