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 32020SP-2375 20mL SPME Clear Radius Bottom Vial, 23x75mm, 20mm 50,13 € 5356B-18M 18mm Metal Closure with bluePTFE/SIL,0.060",pk/100 88,94 € 702340 CC N20-H,si, Sil bltr/ct. PTFE, 45°, 3.0 36,78 €