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

Description 10pcs 12x100mm Lab Chemistry Glassware Borosilicate Glass Teaching Test Tubes Specifications Material Borosilicate GlassSize 12x100mmSuitable For Laboratory teaching planting kitchen etc Features 1 Tube should be preheated prior to heating or easy to burst2 Test tube holder from the tube should be caught in the mouth of one third place3 Loading solution should not exceed 1 2 of the tube heating capacity should not exceed 1 3 of the tube4 Test tube with a dropper to add liquid should be dropped vacant it may not extend into the tube5 Not immediately cooled after heating to prevent burstPackage Includes 1x 10pcs Glass TubesMore Details