Thermo Scientific Epoxy-Coated Half-Size Shelves 6697 are the replacement shelves for Thermo Scientific high-performance Revco and Forma laboratory refrigerators and freezers. Additional epoxy-coated, open-wire shelves are designed to fit individual cabinets. Shelves are available in half-sizes. Undercounter models use full-size only. For 29.2 cu. ft. (826L) units.