Specification Brand : LABOY BulletPoint1 : Made of high quality, heavy duty Borosilicate glass BulletPoint2 : 250ml capacity BulletPoint3 : Single joint with 24/29 size socket BulletPoint4 : Stands 5.25" tall, neck measures 1.3" wide, and bottom diameter measure 3.75" BulletPoint5 : Perfect for any science or home laboratory BulletPoint6 : All 24/40 Joint BulletPoint7 : Round Bottom Capacity : 25 milliliters Color : 25mL,Pack of 2 ExternallyAssignedProductIdentifier : 6971311076272 ExternallyAssignedProductIdentifier1 : 0849230020989 ExternallyAssignedProductIdentifier2 : 00849230020989 ExternallyAssignedProductIdentifier3 : 849230020989 IncludedComponents : Glass Flask ItemName : Laboy Glass 25mL Single Neck Round Bottom Boiling Flask Heavy Wall with 19/22 Joint Heating Reaction Receiving Flask Organic Chemistry Lab Glassware(Pack of 2) ItemPackageDimensions_Height : 2.98 inches ItemPackageDimensions_Length : 3.25 inches ItemPackageDimensions_Width : 3.56 inches ItemPackageQuantity : 1 ItemTypeKeyword : science-lab-boiling-flasks Manufacturer : Laboy Material : Borosilicate Glass ModelNumber : HMF010305L2 NumberOfItems : 1 PartNumber : HMF010305L2 ProductDescription : Round-bottom flasks (also called round-bottomed flasks, Flasks, round bottom, or RB Flasks)having spherical bottoms are more resistance to fracturing under vacuum, as a sphere more evenly distributes stress across its surface. Because of the spherical bottom, cork rings are needed to keep the round bottom flasks upright,or heated by the water bath ,oil bath or sand bath.When in use, round-bottom flasks are commonly held at the neck by flask clamps on a stand. The flasks are usually used in heating or boiling a liquid, in as flasks and receiving flasks for the distillate, used as the flasks in rotary evaporators.It is usually used with other jointed lab glassware like glass condenser,separatory funnels,cow receivers. The round bottom flask has larger heating surface than the flat bottom flask and can be heated evenly.It is usually used in the laboratory operation requiring high temperature and long time heating,or vacuum . Laboy glass flasks are heavy wall designed,made by hand-blowing to ensure uniform wall thickness, made of high-quality borosilicate glass and annealed at 800 degree Celsius ,can be heated directly in an open flame and can withstand typical laboratory thermal variations in Chemistry processes like heating and cooling. ProductSiteLaunchDate : 2020-03-02T11:21:27.298Z ShipsGlobally : 1 Size : 25mL,Pack of 2 SpecificationMet : Astm SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredDgHzRegulation1 : not_applicable SupplierDeclaredDgHzRegulation2 : not_applicable SupplierDeclaredDgHzRegulation3 : not_applicable SupplierDeclaredDgHzRegulation4 : not_applicable SupplierDeclaredDgHzRegulation5 : not_applicable UnspscCode : 52152000