Caps for VWR® Versatile 11 mm Dual Crimp-Top/Snap-Cap Vials. Supplier: VWR International. Description: VWR* Versatile Dual Crimp-Top/Snap-Cap Vial, Color: Clear, Size: 11 mm, Polyethylene, Blue PTFE/White Silicone, Pre-Slit, Versatile neck accepts snap-cap or crimp seal, 40% wider opening than standard vial, Reduced needle damage. Certificates.