Pre-slit White PTFE/Red Silicone Septa, 11mm Crimp-top Aluminum Cap, 5.5mm Centre Hole Back Catalog number: PL30A-016 Availability: In the manufacturer's stock Price on request - + Recommended 5550-11R 11mm Red Poly Crimp™ Seal, PTFE/Silicone Lined [Patented] 22,81 € 5150-11Y 11mm Gold Seal, PTFE/Silicone Lined 29,51 € 702001 N 11 Aluminium crimp cap, silver, center hole Natural Rubber red-orange/TEF colourless Hardness: 60° shore A Thickness: 1.0mm pack of 100 10,92 €