POLYC75 1.0/1.0 PES 1/PK B/B/SPolycap™ TC (PES) 75, 1.0/1.0 µm, sterile, with 1/2 SB inlet and outlet, 1/pk are disposable, dual layer polyethersulfone (PES) membrane filtration capsules that provide efficient filtration for critical aqueous solutions.