low protein binding HPLC vials graduated marking spot open top septa closure for 2ml vials-Aijiren HPLC VialsVials, 2 mL, open-top screw cap, R.A.M.™ (9 mm) convenience kit with closures with septa, unassembled Get Price Achieving Maximum Protein and Peptide Recovery, Sensitivity, and used Waters polypropylene vials and 96-well plates, Waters.