Master pistons for automotive brake master cylinders: slim, stepped pins turned with several shoulders and grooves along their length. In a master cylinder, the piston moves with the brake pedal and pushes brake fluid out to the brake lines. The range covers many profiles and lengths in glossy black, bright silver, satin grey and dark grey finishes, from short stepped pins and long slender stems to a larger spool-shaped piece with two wide collars. It sits in a brake line engineered to reduce noise and increase durability, alongside caliper pistons and hydraulic components. Materials offered: aluminium, brass, SS, MS and plastic.