THESE REPLACEMENT 4"" CASTERS ARE COMPATIBLE WITH THE NEXEL MERCHANDISER REFRIGERATORS (MODELS 243005 243006 & 243035) NEXEL REACH-IN REFRIGERATORS (MODELS 243007 & 243008) NEXEL REACH-IN FREEZERS (MODELS 243009 243010 & 243036) NEXEL MERCHANDISER REFRIGERATOR (MODEL 243037) AND NEXEL MERCHANDISER FREEZER (MODEL 243038). CONNECTS TO LISTED UNIT TO ALLOW FOR COMPLETE SERVICE OF REFRIGERATORS AND FREEZERS.