Compressed Natural Gas Receptacle Available in a variety of sizes. Compressed Natural Gas Receptacle Benefits N Designed for permanent mounting to a compressed natural gas vehicle (NGV) N QC1 Series receptacle utilizes the AGA/CGA NGV 1 profile allowing complete interchangeability to any nozzle conforming to the AGA/CGA NGV 1 standard N QC2 Series receptacle is designed specifically for bus and trucks refuelling N Designed to provide superior flow characteristics