MSQ^™ Caps with Septa, Mass Spec Quality

MSQ^™ Caps with Septa, Mass Spec Quality, thread for 9 mm, natural PTFE/silicone septa, pkg of 100 ea

MSQ^™ Caps with Septa, Mass Spec Quality, thread for 9 mm, natural PTFE/silicone septa (with slit), pkg of 100 ea