Sub-Miniature Rocker Switches - 4M Series These Sub-Miniature Rocker Switches are available in a variety of switch configurations with SPDT and DPDT contact configurations. Silver plated Brass contacts with a mechanical life of 30000 make and break cycles are a feature of these Sub-Miniature Rocker Switches . All these Sub-Miniature Rocker Switches have a UL94V0 case material with Nickel plated Brass bushings and stainless steel housings.