Acrodisc® syringe filters GHP membrane, diam. 25 mm, pore . Acrodisc® syringe filters GHP membrane, diam. 25 mm, pore size 0.45 μm; find -Z259845 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich . PTFE Filter, Unlaminated - 47mm - 5.0um 50 PER PACK