Performance Series 52mm (2 1/16") ELECTRICAL BOOST GAUGE Green/White 52 mm (2 1/16") Green & White 270° LED Display. This one gauge can display either Green or White. The 270° dial sweep provides quick, one glance accuracy. Track tested and race proven, these gauges use precision electric senders to keep hazardous fluids out of the passenger compartment. Our Performance Green/White series gauges are designed so that you can display one color during the day and the other color at night. All Electric Gauges perform a dramatic opening ceremony with a full pointer sweep and self check each time the vehicle is started. If your vehicle is supercharged or turbocharged then this gauge is simply a must have. For peak performance you need to know how much boost you are making at maximum RPM's. Now you can track your boost as you modify your ride! (-30 to +30 PSI display scale: Includes Mounting U-Bracket & hardware, Tubing Kit, T-fitting, Visor, Electric Boost sender, Decals and Instructions) "Thanks! Hands down best service I have ever had in my life. I know it sounds weird but man when you deliver awesome service it makes me want to buy more stuff and just let people know about your products & service. Keep up the good work!" ~Bryan H. "We Don't Need No Stinkin' Controller" "Hey guys I just received the lot of gauges that I ordered from you and I just want to say how impressed I am with them, they are awesome!!" Joseph R. "I Received my mechanical boost gauge in the mail today. I am very impressed with the quality, and the layout on the gauge face looks very good. Thank you for a quality product at a unbeatable price... I will be ordering oil pressure and EGT Gauges shortly."