These screw into the bottom of the brake master. Great Deal. These costs can range from none to over 40% of the value of the item.
BRAND NEW MGB BRAKE MASTER CYLIND PDWA FAILURE SWITCH MGB 76-80 , Triumph TR7
New MGB Brake Master Cylinder 1968-1974 High Quality with Warranty
NEW MGB BRAKE MASTER CYLINDER 75 76 77 78 79 80 , 2 YEAR WARRANTY EXC QUALITY
NEW MGB BRAKE MASTER CYLINDER W FAILURE SWITCH 75 76 77 78 79 80 , EXC QUALITY