Description: VWR Cap, Open top, Black, Polypropylene, Red PTFE/White Silicone, For 8-425 Screw-Thread Vials VWR® Crimp Caps for 11 mm Crimp Top Vials Supplier: VWR International Description: VWR Seal with Tan PTFE/Synthetic White Silicone Septa, Aluminium, Silver cap, Size: 11 mm Screw Caps for VWR® Scintillation Vials Catalog Number: (76329-634)