This case of 50 test tubes is made of Borosilicate (heat resistant) glass and measure 1 1/2 inches by 8 inches and hold 175ml each. Size is given with OD (Outside Diameter) first then length. All measurements are approximate. OD measurement may vary by up to 1mm. These multi-functional borosilicate glass test tubes can be used in the laboratory, the classroom, for crafting, storage or even in the kitchen to hold spices. With your imagination, their uses are limitless... This offer comes with 50 tapered, natural cork stoppers (size #18) to assure a good fit.
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