The Smoke Nozzle Adapter Kit: The smoke nozzle is easy to jam into any fuel or vacuum hose connection where needed to test for leaks with your smoke machine. The smoke cone nozzle can fits into 0.28” to 0.58” hose(7.5mm-14.5mm). Includes: 1 PC of smoke cone nozzle(Billet Aluminum Anodized Red) attached a 59”/1.5m long silicone rubber tube,and the tube ID is ¼”/6mm. Compatibility: For all smoke/vacuum leak detection machines as well as Redline, Autool, OTC Leak Tamer, Autoline Pro, and other smoke machines. Function: For all smoke/vacuum leak detection machines. Material: New high strength aluminum alloy material with a high quality silicone rubber tub (59”/150cm long). (The tube is a kind of high quality elastic silicone,has absolutely no nasty smell) The ruler is not included.