10pcs 12x100mm Lab Chemistry Glassware Borosilicate Glass Teaching Test Tubes

Description: 10pcs 12x100mm Lab Chemistry Glassware Borosilicate Glass Teaching Test Tubes Specifications: Material: Borosilicate Glass Size; 12x100mm Suitable For: Laboratory, teaching, planting, kitchen, etc. Features: 1. Tube should be preheated prior to heating, or easy to burst 2. Test tube holder from the tube should be caught in the mouth of one third place 3. Loading solution should not exceed 1/2 of the tube, heating capacity should not exceed 1/3 of the tube 4. Test tube with a dropper to add liquid should be dropped vacant, it may not extend into the tube 5. Not immediately cooled after heating, to prevent burst Package Includes: 1x 10pcs Glass Tubes More Details: