20mm Aluminium Headspace Crimp Cap, Open Hole, Silver with Pre-fitted Beige PTFE/White Silicone Septa, 3mm

Alternative to:
La-Pha-Pack: 20 03 0828, National: C4020-32AP, Agilent: 5183-4478, Fisher: 11580505, VWR: 548-0592