General and Autosampler Vial Accessories. Accessories used with vials including vial decappers, crimpers for crimp and flip-off vial seals, and colored vial cap inserts for easy vial recognition. MicroLiter EZ-Decappers™ Hand Operated Cappers and Decappers by MicroLiter are easy-to-use tools for crimping and decrimping chromatography vial