Uvison.com Aijiren Technology Acrodisc Syringe Filter, GHP, 25 mm, 0.45 µm, Aqueous, 1000/case - WAT200829 - Update February 2021: These syringe filters have been discontinued and replaced by ref 186009323 - VPREP 25mm 0.45µm wwPTFE 1000/Pk Pack of 1000 GHP has the broadest chemical compatibility and exhibits minimal protein binding.