10-20mL 18mm Screw Thread Headspace vial ND18 10ml & 20ml Screw Neck ND18 rounded bottom headspace vial with matched 18mm Magnetic Precision Screw Metal Cap,17.5mm PTFE/silicone septa Product Description: 1.A rounded bottom is more sturdy and thus more resistant to the high pressure within the vial during the heating process. suitable PE,Tekmar ,CTC PAL,Varian,Gerstel,Shimadzu, Agilent and Thermo scientific. 2.Available with amber or clear vial 3.Available with 20ml or 10ml vial                                   Features: 1) Screw top vials and caps are recommended for the tightest seal and the most      reproducibleheadspace results. 2) CombiPAL headspace vials and caps are precision-thread, making them an      excellent choice for dependability and ease-of-use. 3) They are ideal for applications inthe environmental, food and beverage,      industrial hygiene, drug analysis, and clinical chemistry industries. Magnetic Universal Screw Seals ND18 for Precision Thread Vials      100pcs/pack SACA001 blue PTFE/white Silicone septa, 18mm magnetic screw cap, 8mm centre hole Product advantage: 1, ISO certificated company system keeps all the process under control ; 2, 4 years OEM experience promise all the orders can be handled very well ; 3, 1 year warranty for the products we supplied, guarantee the stable quality ; 4, All the products are CE certificated ,also SGS test report if need ; 5,24*365 hours sales &technical service will solve the issue in 2 hours ; 6, 5million stock gurrantee 24hours delivery time for all the regular orders ; 7,More than 2000kinds of lab consumables offering you with the best price; 8, Free samples for your test under our cost anytime; 9,No MOQ for users or dealers,different package meets your requirements .