The Opticap XL and XLT from Merck are disposable capsule filters with milligard media that are used to remove the time and cost associated with assembling, cleaning, and verifying stainless steel housings. The capsule patented design allows a rare thermal and hydraulic stress protection, resulting in high efficiency and assurance in the sterility procedure and cleanliness. Furthermore, the special capsule design with plated milligard membrane reduces hold-up and decrease production losses.