Single Neck Round Bottom Flask USA Solvent This makes the wood harder Select Length:10 Feet This makes the wood harder Specification Chamber Material 3004 Aluminum Gasket Material Silicone Lid Material Glass Internal Dimensions (ID) 6 Single neck round bottom flasks can be used for a variety of applications such as capturing and collecting material and also used for boiling off material through distillation **Glassware Safety Disclaimer: BVV™ is not responsible for failure of glassware which must be inspected before and after every use because it may eventually develop imperfections or damage through normal usage