One-piece molded racks have a three-tier grid design. Polypropylene construction provides good chemical and thermal resistance. Autoclavable. Racks feature a 3/4" x 2-3/4" labeling area on two sides. Open design allows easy viewing of contents from all sides.Available in sizes that hold 13mm or 16mm tubes. Both racks feature a 6 x 6 array of holes. Additional Info: Test Tube Rack, 1-Piece, Pp, 13mm X 36 Tubes, Pack Of 4 Package Size(L x W x H): 11 X 7.5 X 3 (IN) Categories: Racks, Test Tube HTS Code: 3926.90.9910 UNSPSC: 4.11228e+007 Country Of Origin: INDIA