Uniform wall thickness, flat bottoms, and low expansion 3.3 Borosilicate glass make Globe Glass™ heavy duty low form Griffin style beakers strong and durable. Thicker walls improve mechanical strength to protect against breakage in the most rigorous uses. Beaded rims and formed spouts facilitate accurate and steady pouring of liquids. Globe Glass low form Griffin stylebeakers are available in sizes from 250mL to 4000mL.• Meet ASTM E960 Type II Specifications• Made exclusively from ASTM E438, Type I, Class A, 3.3 borosilicate glass• GlassGuard™ packaging system protects against transit damage• Thicker walls protect against damage• Formed pour spout for easy pouring• High resistance to chemicals• Uniform wall thickness• Dual metric scale graduations• Durable white enamel printing• Large white marking areaNote: Not recommended for use on hot plates