A micro-electrical-mechanical system switch. The hydraulic device has an inner bore. Each of the propylene block copolymers and has a crystalline propylene polymer component, and a propylene-ethylene random copolymer component,. Additionally, the drive train induces a drag on the spool from which ribbon is being unwound with the use of a drag-overrun assembly. The side notch has a height substantially equal to the height of the first side wall and the bottom notch has a height less than the side notch height.