POLY150 .2/.2 PES 1/PKB/B/S/WB Polycap™ TC (PES) 150, 0.2/0.2 µm, sterile, with 1/2 SB inlet and outlet plus filling bell, 1/pk are disposable, dual layer polyethersulfone (PES) membrane filtration capsules that provide efficient filtration for critical aqueous solutions.