Specification Brand : Chemglass BulletPoint1 : Heavy Wall BulletPoint2 : 250mL BulletPoint3 : Sold as each BulletPoint4 : Reusable: It can be reused by washing with warm water, which is more environmentally friendly and will not cause pollution to the environment BulletPoint5 : Great for Professional Laboratories, Classrooms & Household; Superior chemical durability and heat tolerance. Designed for use in professional laboratories, but is an ideal choice for science classrooms and household use. Capacity : 1000 milliliters ExternallyAssignedProductIdentifier : 6460687189360 IncludedComponents : Flask ItemName : CHEMGLA - 1000mL Flask-Filtering-Heavy Wall-#7 Rubber stoppe r w/hose, PK6 ItemPackageDimensions_Height : 1 inches ItemPackageDimensions_Length : 1 inches ItemPackageDimensions_Width : 1 inches ItemPackageQuantity : 1 ItemTypeKeyword : science-lab-filtering-flasks Manufacturer : Chemglass Material : Glass Material1 : Plastic Material2 : Ceramic ModelNumber : CG-8514-1L NumberOfItems : 6 PartNumber : CG-8514-1L ProductDescription : Chemglass CG-8514-1L heavy wall filtering tubulation rubber stopper flask. These flasks, with tubulation, are blown in special molds, in shapes designed to give maximum mechanical strength. For convenience, the flasks are graduated to show approximate capacity. The neck finish affords an excellent fit for rubber stoppers. Tubulation OD on sizes up to 1000mL is 10mm. Tubulation OD for 2L and 4L is 12.5mm.