Vibration Controlled Dial. Heavy-duty American made gauge with stainless steel case and bezel will not rust, chip, peel or oxidize like other designs. Not dampened by liquid, suited for use with alcohol. Accurate to within 1%; marked in one-quarter pound increments. Compact 1.5 inch diameter gauge can be mounted to fuel regulator or fuel block for convenient fuel pressure tuning. Includes 1/8 inch NPT Male Fitting.