Heathrow Scientific HS24311B Peg Tube Rack, 50 Wells, Polypropylene, 14 to 17 mm, Blue (Pack of 2) Autoclavable, fiberglass-reinforced polypropylene racks are ideal for bench work or storage of test tubes Spacious peg design allows easy viewing of tube contents Conveniently use as a drying rack for glass plates or upside-down tubes Includes embossed indexing, ribbed grips, and drainage holes Pegs remain straight even after repeated autoclaving