Eheim Ehfi Mech Mechanical Filter Media The Eheim Ehfi Mech Mechanical Filter Media offers optimum water values and perform different functions in the water setting. The media offers a coarse surface, and is used where water enterst the filter process. This mechanical filter medium offers effective water treatment with long-lasting results. Features: . Easy to clean and can be used several times . Hollow ceramic cylinders for mechanical filtration . Traps solid dirt particles at the water inflow and ensures an even flow of water through the filter . Can be washed under lukewarm water . Pre-filter mechanical filtration . Traps large-sized debris . Re-usable, cost effective Item Specifications: Size: 1 Liter, 5 Liter