Globe Glass filter flasks meet ASTM E1406 specifications. Thick, heavy-duty walls provide the mechanical strength necessary for filtering operations. Flasks have side tubulation for connection to 7mm-8mm flexible tubing. Globe Glass filter flasks are designed with reinforced, beaded rims for strength and resistance to chipping. • Meet ASTM E1406, Type II, Class I Specifications • Made exclusively from ASTM E438, Type I, Class A, 3.3 borosilicate glass • GlassGuard™ packaging system protects against transit damage • Thick walls for mechanical strength • Side tubulation connects to 7mm-8mm flexible tubing • High resistance to chemicals • Uniform wall thickness • Reinforced beaded rims to resist chipping • Dual metric scale graduations • Durable white enamel printing • Large white marking area