Deutsch & Neumann Silicone Rubber Stoppers 8 x 12 x 20mm

10mm x 0.040" Red PTFE/Silicone w/Slit Septa

Septa N20 But r/PTFE gr, 50°, 3.0

GRIP STOPPERS FOR CENTRIFUGE TUBES, ROUND BOTTOM, LDPE (THG)