GRIP STOPPERS FOR CENTRIFUGE TUBES, ROUND BOTTOM, LDPE (THG) Back Catalog number: 9400787 Availability: In the manufacturer's stock Price on request - + Recommended 603090-08 8mm x 0.030" Black Viton® Septa, pk/100 41,14 € 606040-13 13mm x 0.060" PTFE/Red Rubber Septa 17,52 € 606050G-15 15mmx 0.060" Gray PTFE/SIL, pk/100 29,30 €