11mm Snap Cap. Blue Polyethylene with Clear PTFE/Natural Rubber Septa, 1mm

Alternative to:
La-Pha-Pack: 11 15 1856, Chromacol: 11-PSN(B)-8RT1 (alt.), National: C4011-51B (alt.), Agilent: 5182-3458 (alt.) , Fisher: 11867301, VWR: 548-0433