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 5181-3383-50 Septa , Partial Thru hole Red 11mm 50/PK 1 974,22 Kč 5188-5367 Gold Plated Inlet Seal with Washer 1 669,85 Kč 5183-4761-100 Septa Non-Stick Long Life 11mm 100pk 5 667,73 Kč