Plastic IGLOO style housing caps provide effective insulation for a GTO connection to a neon tube housing. Listed for dry and damp locations at 7,500V max (15,000V mid-point ground). Fits #100, #200 and #200P or any 8/32″ housing stud. UL and CSA listed. Note: Glass housing must have Listed cap when used in a Wet Location. Igloo style cap must be used if the correct 1 1/2″ spacing in the enclosure cannot be maintained.