Precision Seal ® rubber septa cap, white, for 3 mm O.D. tubes and ampules, pack of 10 ea Z567698 PTFE-faced silicone septa for Q-Tube ™ and QianCap ™, Septa 12 mL Low Z512818 Serrated silicone rubber septa, bottom O.D. 8.5 mm, fits neck I.D., 6.5 mm Z565644 Sleeve stopper septa, bottom I.D. × O.D. 1.5 mm × 3.9 mm, red Z126578