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 310020-2346A 10mL Amber Headspace Vial, 23x46mm, Flat Bottom, p 50,94 € 5351TB-18M 18mm Silver Magnetic (Metal) Closure with Transluc 91,25 € 36020A-2238 6mL Clear Headspace Vial, 22x38mm (for CTC PAL), 42,18 €