4554 GHP Acrodisc Minispike, 0.2 µm, 13 mm 100/300 4556 GHP Acrodisc Minispike, 0.45 µm, 13 mm 100/300 purge” minimizes fluid retention within the filter device. Fill the syringe with the solution to be filtered. CAUTION: Use of syringes smaller than 10 ...