The Air-Gard system makes hard to reach inner dual valve stems easily accessible for proper tire inflation. The RG series utilizes reinforced nylon hose that is durable, long lasting, non-kinking,and chemical resistant. Stabilizer bracket snaps into hand hole to keep extender centered for easy access. Designed to fit nearly every vehicle with 16", 16.5" or 19.5" dual wheels. 2 Hose set.