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 70233 CNTO N20, go, But dgr/ct. PTFEgr, 50°, 3 44,00 € 5356B-18M 18mm Metal Closure with bluePTFE/SIL,0.060",pk/100 88,94 € 702261 20mL HS vial,clear,22.5x75.5mm,flat bottom,pk/100 29,82 €