This was the third extension set I have purchased. 1. 2 started to leak where the braided hose was crimped to stainless steel after about a year of 1000 miles. The last set had one that dripped right out of the box. No response from Phoenix Customer Service regarding replacement. Dropped them and bought extended brass valve stems for the dual rear wheels. Recommend the same to anyone who needs to easily check dual rear wheels and add tire pressure sensors.