Septa 17.5mm for ND18, Silicone blue/PTFE white, 1,3mm, pk/100 Back Catalog number: 17021417 Availability: In the manufacturer's stock Price on request - + Recommended 8010-0205 CL Adv Green inlet septa 10mm 50pk 108,99 € 5188-5367 Gold Plated Inlet Seal with Washer 62,88 € 5183-4757-100 Septa Non-Stick BTO Inlet 11mm 100pk 197,26 €