Closed-face caliper piston for automotive disc brake calipers: a precision-machined cylinder with a flat, solid end face and a chamfered edge. In a brake caliper, the piston moves under hydraulic pressure to press the brake pad against the disc. The part is made in bright metallic and glossy black finishes and in more than one diameter. It belongs to a brake line that also includes master pistons and hydraulic components, engineered to reduce noise and increase durability. Materials offered: aluminium, brass, SS, MS and plastic.