plug-10mm - this is a 10mm x 1.0 hex head bolt and copper crush washer kit that can be used on your front brake system if the original brake switch goes out, or is not needed any longer. You might need it if you change a dual front disk setup back to stock single setup to plug up the hole where one line was. You might also use it if you update your master cylinder to a Brembo REC type that has a microswitch built in [far superior] and want to remove the old brake switch in the manifold [splitter]..
