This white face tachometer offers great performance with distinct styling. It comes with a Chrome housing and features air core meter movement for maximum accuracy and quick response.The base is designed to adjust for different height steering columns. It's also backlit for easy night time reading. To see our entire line of Autometer products, enter AUTOMETER in the search box These tachs operate on 4, 6, or 8 cylinder engines with standard, electronic ignitions with 12 volt power. Dial face dia.=3-3/4in., Bezel dia.= 4-3/8in., Case dia.=3-3/4in., Case depth=3-3/4in. Allow 1in.-3in. for Fittings & Tubing.