RAC20NE-12SK/277/OF RAC20NE-24SK/277 RAC20NE-24SK/277/CC RAC20NE-24SK/277/CC/EPID RAC20NE-24SK/277/EPID RAC20NE-24SK/277/OF RAC20NE-36SK/277 RAC20NE-36SK/277/EPID RAC20-SA RAC20-SB