Acrodisc, Minispike Syringe Filter, GHP, 13 mm, 0.45 µm, Aqueous, 100/pk. As Pall discontinued in 2021, as soon as the Aijiren Technology inventory depleted, we recommend using higher-performing, wwPTFE membranes. For aqueous and organic solvent extraction and filtration, use the Acrodisc, Minispike Syringe Filter, GHP.