Specification Brand : Fiildtekii BulletPoint1 : 5pcs 250ml PTFE lab tubes with sealing threaded cap BulletPoint2 : Material:100% Virgin PTFE(Polytetrafluoroethylene) BulletPoint3 : Wide Usage in Lab:Heating digesting,Frozen,Centrifugal,Corrosives storage,Wet chemical analysis BulletPoint4 : Temperature Range:-380F to 500F BulletPoint5 : Manufactured in dust-fee workshop Color : White ExternallyAssignedProductIdentifier : 5400088128934 ItemDisplayDimensions_Length : 3.23 centimeters ItemName : 250ml PTFE Centrifuge Test-tubes, 5pcs, 100% virgin Teflon heating digestion tubes,Lab tubes with threaded cap ItemPackageDimensions_Height : 15 centimeters ItemPackageDimensions_Length : 15 centimeters ItemPackageDimensions_Width : 10 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : science-lab-micro-centrifuge-tubes ItemVolume : 1 cubic_centimeters Manufacturer : GS tech Material : PTFE ModelNumber : QIANGFU NumberOfBoxes : 1 NumberOfItems : 1 NumberOfLithiumMetalCells : 1 PartNumber : GS23PTET250 ProductDescription : Fiildtekii brand focus on R&D, production, and sales of fluorine plastics (PTFE, PFA, FEP, ECTFE, etc.) and their composite products. We use 100% virgin PTFE(Polytetrafluoroethylene),following advantages compared to other materials: Corrosion resistance: resistant to strong acids, strong alkalis, various organic solvents. Temperature resistance: can work for a long time under the temperature of 500F. Non-adhesion: does not adhere to any substance. Non-toxic: physiologically inert, harmless to the human body. Not easy to break, long-term use of more economical than glass products.