Magnetic Screw Seals ND18, Silicone blue/PTFE white, 1,3mm, pk/100 Back Catalog number: 18031309 Availability: In the manufacturer's stock Price on request - + Recommended 31018F-2346A 10mL Amber Flat Bottom Headspace Vial, 23x46mm, 18 56,50 € 36020A-2238 6mL Clear Headspace Vial, 22x38mm (for CTC PAL), 42,18 € 320018F-2375 20mL Clear FB Headspace Vial, 23x75mm,18mm, pk/100 43,23 €