2.0 mL, 9 mm Short-Cap, Screw-Vial Closures (Polypropylene, preassembled) Type Color Septa Material 100-pk. cat.# Screw-Thread Blue PTFE/Butyl Rubber 24473 Screw-Thread Blue PTFE/Silicone 24485 Screw-Thread Green PTFE/Silicone 24487 Screw-Thread Yellow PTFE/Silicone 24493 2.0 mL, 11 mm Crimp-Top Vials, 12 x 32 mm Modification Type Color