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 702648 CenterGuide BTO Septa N 11.5 74,51 € 5080-8896-50 Septa General Purpose Gray 11mm 50/pk 79,05 € 5183-4761 Septa Non-Stick Long Life 11mm 50pk 126,90 €