Screw Top Vials, Caps, Septa and Kits. Precision-formed neck for optimal robotic arm handling 2 mL Deactivated Wide Opening Screw Top Glass Vials. Your reliable partner - Scantec Nordic. 2.3.3 Natural Rubber/TEF, RedRubber/PTFE, Butyl/PTFE and Silicone/PTFE Seals, closed top. 2.4. Septa 8mm. 2.5. PP Screw Caps ND8. 2.6. Screw Neck Vials ND8,