ITEM TITLE :- Triumph Norton BSA Replica smiths Replica Tachometer 0-10 RPM x 1000 Tacho Meter 4:1 Ratio , SUITABLE FOR :- Norton , BSA , 1970 - 1974 (Triumph, T120 Bonneville, TR 6 , TR 7, Tiger 650, 750 Twin, T150 3cyl Motorcycle , MATERIAL :- Standard Product , Compatible PART NUMBER :- NA , MEASUREMENT :- AS shown on the picture , Triumph Norton BSA Replica smiths replica Tachometerâ 80 mm size, M 12 X 1 Thread Connection with 2.6 mm cable inlet size, Chrome Bezel 3 13/32" diameter including bezel, 3 1/8" diameter of bottom. 2" deep under bezel, 2 1/8 deep including bezel,