GRIP STOPPERS FOR CENTRIFUGE TUBES, ROUND BOTTOM, LDPE (THG) Back Catalog number: 9400787 Availability: In the manufacturer's stock Price on request - + Recommended 610050-13 13mm x .100" PTFE/Silicone - 10mil PTFE/90mil Sili 40,02 € 612550-20ULB .125 Thick Natural PTFE/Blue Ultra Low Bleed Sili 61,29 € 606HTX-17 17mm Diameter HT-X High Performance Blue Silicone 40,23 €