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 8010-0228 CL BTO inlet septa 12.7mm 48pk 115,55 € 702609 Standard septa, N 9 ST 61,05 € 8010-0263 CL Gray inlet septa SHM Plug 50pk 61,87 €