National Scientific – 2ml Crimp Vials & Caps – Greenwood Products. Items 1 – 12 of 17 2mL Clear Crimp Vial Silanized w/ Numbered graduations and patch 11mm Aluminum Crimp Seal w/PTFE/Red Rubber Septum (1000/pk) SKU: 20 mm Crimp Top Aluminum Silver Cap – B4000022 | PerkinElmer. For sealing sample vials for temperatures up to 210°C.