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 702625 Silicon septa PTFE, N10 99,21 € 702622 High temperature septa N 12 HT 102,62 € 8010-0218 CL BTO inlet septa 9mm 100pk 194,81 €