Specification Brand : LABOY BulletPoint : Glass Reaction Flask Wide Mouth Spherica Cover / Rugged spherical Glass reaction flasks./ Made from borosilicate glass 3.3/ BulletPoint1 : DESIGN----This schlenk tube is comprised of a heavy wall cylindrical tube which is very convenient for magnetic stirrer during reaction.With 0-4mm high vacuum valve having PTFE o-ring at tip and PTFE wiper to protect the O-ring and shaft.With a standard taper joint on the top of tube attaching to lab glassware for adding ,transferring or reflux. BulletPoint2 : USE---The schlenk flask with high vacuum valve is usually used as a storage flask or reaction flask in air-sensitive chemistry with high sealing performance.The high vacuum valve at top is not only used to control the liquid or gas flow,but also can be removed off to add or transfer materials.For a reaction setup, this flask is used to conduct reactions at elevated pressures and temperatures as a closed system. BulletPoint3 : DIMENSIONS----This round bottom flask is designed with 0-4mm high vacuum valve on side-arm ,with 14/20 standard taper outer joint,which can be stopped by a 14/20 glass topper or 14# rubber septum.Capacity of 100mL BulletPoint4 : HEAVY WALL ---This schlenk tube is heavy-wall designed , made by hand-blowing according to ASTM E438 ,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,durable and reusable. BulletPoint5 : Titanium alloy mechanical sealing. Capacity : 250 milliliters CareInstructions1 : Hand wash CareInstructions2 : Wipe clean ExternallyAssignedProductIdentifier : 6682783190969 ExternallyAssignedProductIdentifier1 : 0827674687937 ExternallyAssignedProductIdentifier2 : 827674687937 ItemName : Laboy Glass 100mL Schlenk Reaction Tube with 14/20 Outer Joint & 0-4mm High Vacuum Valve on Side-arm Chemistry Air-Sensitive Lab Glassware ItemPackageDimensions_Height : 2 inches ItemPackageDimensions_Length : 2 inches ItemPackageDimensions_Width : 2 inches ItemPackageQuantity : 1 ItemShape : Cylindrical ItemTypeKeyword : science-lab-reaction-kettle-flasks ItemVolume : 250 milliliters Manufacturer : Laboy Material : Borosilicate Glass ModelNumber : HMF012703 NumberOfItems : 1 PartNumber : HMF012703 ProductDescription :