Screw Cap, Headspace, Steel, PTFE/Silicone Septa (Top White, Bottom Blue) 18 mm, 100/pk. Cap Size: 18 mm 5188-2759

Cap 18mm PTFE/Sil 100 PKSuitable for: 18mm Screw Headspace VialsCaps Material: Metal Septa Material: Blue PTFE/ White SiliconeSepta Size: 17.5*1.5mm Cap Features: 8mm Centre Hole Color: Metal SilverDescription18mm precision screw metal cap, silicone/PTFE septaCapsMetal caps offer the widest range of temperature tolerances and are very resistant to fracture from impact. Metal caps are great for gas chromatography applications. A metal closure is manufactured from either steel (coated with anti-corrosive coating of either chromeplate or tinplate) or aluminum.PTFE/Silicone Septapure silicone is laminated to PTFE to give a pure, highly inert septum with excellent resealing characteristics even after repeated punctures.PTFE/Silicone septa are the preferred product for use in most HPLC and GC applications where resealability and high purity are critical. Works well for applications where ease of needle penetration is important.Septa-silica gel has strong repetitive sealability, and it can maintain good close performance after multiple injections; PTFE is a material with better chemical conditions at present, and it can withstand strong acids and alkalis. The two materials After compounding, the bottle can be used for various laboratory purposes such as sealed sampling, chemical storage and so on. Packag: Note: This product is only for cover and septa, it doesn't include the vial. ==========Hign-concerned Chemical : NoneModel Number : 17.5mmOrigin : Mainland ChinaClassification : BeakerMaterial of cover : metal screw capMaterial of septa : White PTFE / Blue silicone septaSuitable for vial : 10ml/20mlDiameter of cover : 18 mmDiameter of center hole : 8 mmWasher : 17.5 * 1.5 mmThickness of septa : About 1.5 mmPacking : Pack of 100/PK

• PTFE/Silicone septa are the preferred product for use in most HPLC and GC applications where resealability and high purity are critical. Works well for applications where ease of needle penetration is important.
• Septa-silica gel has strong repetitive sealability, and it can maintain good close performance after multiple injections; PTFE is a material with better chemical conditions at present, and it can withstand strong acids and alkalis. The two materials After compounding, the bottle can be used for various laboratory purposes such as sealed sampling, chemical storage and so on.