Cole-Parmer Aluminum Crimp Cap, 20 mm Dia., Pressure Release, Pharma-Fix Butyl/PTFE Septum; 1000/PK

Constructed of aluminum, these crimp vials are ideal for use with your crimp neck vials. To ensure autosamplers function reliably, these caps and septa meet the rigorous specifications demanded by both the analysis and the instrument itself. Defined hardness and cleanliness properties ensure there is a septum available to be both fully compatible with the autosampler needle and meet the demands of the specific analysis.