The Sun Frost RF4, R4, and F4 are our smallest refrigerators and freezers. Like the R10 and F10, they have the same width and depth as the larger units. The RF4 consists of a refrigerator with an ice tray freezer section. The R4 is a refrigerator-only unit, and the F4 is a freezer-only unit. For convenience, these units would require a higher base cabinet, or they could be placed on a countertop. Our 4 cubic foot models are also ideal for use in bus conversions, boats and RVs.