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 5181-1260 Septa thru hole 5mm 25/PK 1 042,60 Kč 5190-3158 Septa No-Stick Adv Green 11mm 400/pk 17 350,20 Kč 5181-1261 Septa high backpressure 5mm 25/PK 1 032,17 Kč