Front Brake Master Cylinder 1/2″ with Black Aluminium Lever, Brake Light Switch, Stainless Steel Banjo Bolt, if Clamp with Mirror thread is required use optional clamp K40104) Complete master cylinder with lever, brake light switch, banjo bolt and sealing washers. Piston diameter 1/2″ Fits all 22mm / 7/8″ handlebars Optional mirror clamp with hole distance 30mm: K40104 Application: SR500, XT600-’86, XT600E/K (Piston diameter 13mm), suitable for single disc brake