Identified by its ¡§Black Light¡¨, the BLM (Black Light Meter) Racing Meter is the only gauge on the market featuring the unique black light illumination. Featured in a Carbon face and Chrome bezel, a black light bulb is installed in the front of the gauge; this process gives the meters a purplish fluorescent glow on the BLITZ® logo. BLM Racing Meters are available in Boost, oil/water Temperature, oil/water Pressure, and Exhaust Temperature. (Available only in 60mm, all gauges include necessary hardware and sensors.)