Plastic Double insulated Sealed Toggle Switch - Flat Terminal - SPST ON-OFF These toggle switches are designed to keep the elements out. The toggle and the body are made from double insulated plastic (flammability rating: UL 94 flame class 94V -1) with an Internal O ring seal. Recommended mounting hole: 1/2" diameter. Excellent switch for marine and outdoor purposes. Available in SPST, SPDT, DPST, and DPDT configurations.