Fits my old one perfectly. I work as a mechanic. This allows for more airflow than my old one, so the tire fills up faster. Very easy to use. The only downside is the meter gives you half the decimal, but it's only 0 or 0.5, my old one gave you actual increments. Just a day later he started sucking air. Thought it was just a rehearsal. The second day was at the other end. I found that there are o-rings on both ends. The air pushed the rings out because there is no channel or grove to hold them. The photo shows where they are. It's easy to fix, but it's likely to happen again. Just use teflon tape next time.