Description Epoxy Coated steel wire racks are chemical and corrosion resistant Coating provides a protective and smooth coat that is impervious to weak acids , bases and salts. 6 X 6 Format Rack Measures 4.5″ x 4.25″ 2.5″ Outer Diameter permitted of tubes 10-13mm or less Blue Epoxy Coated Steel Wire Test Tube Rack, 36 Holes, Outer Diameter permitted of tubes 15-16 mm or less, 6 X 6 Format Rack measures 4.5″ x 4.25″ x 2.5″ Holds a total of 36 test tubes. Coated steel wire racks are chemical and corrosion resistant. Coating provides a protective and smooth coat that is impervious to weak acids , bases and salts. With stands temperatures up to 121 degrees C ( 249.8 degrees F)