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. 4 X 10 Format Rack Measures 9.5″ x 4″ x 3.25″ Outer Diameter permitted of tubes 18-20mm or less Blue Epoxy Coated Steel Wire Test Tube Rack, 40 Holes, Outer Diameter permitted of tubes 18-20mm or less, 4 x 10 Format Rack measures 9.5″ x 4″ x 3.25″ Holds a total of 40 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)