Silver aluminum, PTFE/butyl rubber septa 500/pk 5061-3370 Silver aluminum, clear PTFE/red rubber septa 1000/pk 5183-4498 Silver aluminum, PTFE/silicone/PTFE septa 1000/pk 5183-4499 Silver aluminum, PTFE/silicone septa 1000/pk 5183-4500 Crimp Caps Silver aluminum, black Viton septa 100/pk 5181-1212 Silver aluminum, thin PTFE septa 100/pk 5182