Pall 79791 Filter Holder Support Screen, Stainless Steel Screen for 25 mm in-Line Filter Holder, Non Sterile Spare Parts and Accessories (Screen Only) for Sterile Filtration and Clarification.: Amazon.com: Industrial & Scientific
NiSi V7 100mm Filter Holder Kit with True Color NC CPL and Lens Cap | NiSi Optics USA
Benro Master Series 100mm Filter Holder with 95mm Mounting