175-17500 Chemical Laboratory Equipment And Supplies | 175-17542 GLASSWARE, LABORATORY, STOCK ONLY | 175-17554 Laboratory Supplies: Asbestos Squares, Corks, Files, Glass Cutters, Ring Stands, Stopcock Grease, Tongs, Wire Gauze, Etc. | 490-49000 Laboratory Equipment, Accessories And Supplies: General Analytical And Research For Nuclear, Optical, And Physical | 490-49043 Laboratory And Scientific Equipment And Supplies (Not Otherwise Classified) | 493-49300 Laboratory Equipment, Accessories, And Supplies: Biochemistry, Chemistry, Environmental Science, Etc. | 495-49500 Laboratory And Field Equipment And Supplies: Biology, Botany, Geology, Microbiology, Zoology, Etc. | 495-49528 Biotechnology And Clinical Equipment And Supplies