The 300 series “Trouble Shooter” brass case gauge comes with an optional maximum indicating pointer, to perform system set-up and diagnostics, and identify spikes in a system. They are rated for pressure ranges from vacuum through 15,000 psi and are designed with a 212- or 4-in. diameter case, which is bottom or back connected. One-piece die cast unit eliminates leakage. Glycerine fill reduces the effects of vibration, pulsation, and shock. Maximum indicating pointer is easily reset with a knurled thumb screw. Options and accessories include front or rear flanges, chrome cover ring, chrome bezel with U-clamp, multiple lens options, adapter ring, 716 in.-20 straight thread, laser marking, stainless steel tagging, and a variety of orifice sizes .