Hubbell Wiring Device-Kellems floor sub plates are used with the brand's fire rated poke throughs in datacom and / or power applications. They feature cast aluminium construction with black, brass & aluminium powder-coated finish for corrosion resistance & prolonged services and have threaded hubs, ensuring perfect seal. Some models have carpet flanges that do not require universal covers to protect electrical components while some models come with open system plates for maximum data flexibility. Variants are available in 1, 2 and 4 gangs for securing electrical components within.