New Lucas type SPB401 hydraulic brake light operating switch fitted with two Lucas connectors.

Thread is 3/8" UNF x 24 TPI. 

As fitted to Triumph TR3 & TR4, Austin Healey 3000, Lotus Europa, Elan S3 & S4 and MGC, together with a wide range of other classic cars.

Would also make a suitable brake light switch for the special & kit car builder.