Tamper-Resistant Surface Style Cover Assembly - Die-cast aluminum cover assembly. Cover assembly is available in the following powder coated finishes: (BK) black, (GY) gray, (NK) nickel, (BS) brass, (BZ) bronze, and (AL) aluminum. 6CTC2 Series cover assemblies designed for use with 6STCP, 6STC, and 6STCPAV Poke-Thru Stem Assemblies. NOTE: Add suffix TR to the end of the part number to indicate tamper-resistant cover assembly. Tamper-resistant versions are secured with a single tamper-resistant screw.