DO NOT BUY. What waste. After 9 months of normal home use, this Vondior pressure gauge is leaking and no longer holding pressure. I thought it was a well made pressure gauge but I was wrong. I have many other pressure gauges that are many years old and work well. I thought I would buy this gauge to use as a comparison to my other gauges. NOW this Vondior gauge is broken and useless except to toss it in the bin. I will never buy from Vondior. Your products are not durable.