This gauge is commonly used to read a regulator's first stage intermediate pressure and has a range of 0-300 psi. 1/4" NPT male center back connection. Utilizes a stainless steel case. All wetted parts are stainless steel. Panel mounting requires only a 2.5" hole and does not require flange screws. A u-clamp holds the gauge secure in the panel. A good, general purpose gauge that has many applications. Accuracy is +/- 2.5% full scale.