Full-View Series 200 Test Tube Support, Diameter 18 -20, Tubes 12, Drying Pins 5, 8" x 4" x 2 3/8" Part Number - 200 Material Type -Polypropylene (PP) Number of Items - 1 Import Designation - Made in USA Autoclavable and Chemically resistant. Holds 12-18mm test tubes with 5 drying pins, designed for high school and college labs....