As a first-time buyer in the Industrial and Scientific category I found this fitting to be a lifesaver. As a result of using this product, I found that setting up my pneumatic system was made easier and more efficient. The half union adapter fit perfectly and stayed securely in place without any leaks. The precision of the fitting was impressive, and overall, the product proved to be reliable and efficient. The only downside was the price, which may BE a bit steep for some buyers. .See full review