Disposable culture tubes are manufactured from high quality borosilicate glass. Rimless design enables easy plugging using a stopper. Caps not included. Tubes meet ASTM standards and are alkali-free and inert. Additional Info: Disposable Culture Tubes, Borosilicate, 75ml Package Size(L x W x H): 9 X 7 X 9 (IN) Categories: Culture Tubes, Glass HTS Code: 7017.90.5000 UNSPSC: 4.11217e+007 Country Of Origin: INDIA