11mm Snap Cap, Blue Polyethylene with Red PTFE/White Silicone Septa

Alternative to:
La-Pha-Pack: 11 15 1854, Chromacol: 11-PSN(B)-ST1(alt.), National: C4011-54B (alt.), Agilent: 5182-0541 (alt.) + 5185-5916 (alt.), Fisher: 11814910, VWR: 548-0432, Waters: 186000303