Package includes 50ml Lab Distilling Flasks Middle ground mouth: 19/26 or 24/29 Side ground mouths: 19/26 (two) or 24/29 (two) Material and construction Made of , heavy duty 3.3 borosilicate glass Built for durability and long service in demanding lab environments Design benefits and performance Roundbottom flasks are commonly used for chemical reactions in reflux set ups and laboratory scale synthesis The roundbottom design distributes stress more evenly across the surface, increasing resistance to fracturing under vacuum Spherical shape enables more uniform heating or boiling of liquids Quality and standards Each flask is designed by a team of laboratory professionals and experienced engineers Manufactured with grade raw materials Produced according to international quality standards to withstand tough laboratory use Use scenarios Reflux reactions requiring compatible joint sizes (19/26 or 24/29) Distillation setups where controlled heating and stable boiling are needed Laboratory scale synthesis projects that demand durable glassware under vacuum and heat Notes Designed to support standard lab workflows with reliable joint compatibility and robust performance Suitable for professional laboratory environments and educational settings that require dependable glassware