The JBL Bio Filter Foam Cartridge is designed for use with JBL CristalProfi filters. Place the UniBloc in the middle filter basket for optimum performance. If desired, you can remove the central part of the UniBloc (the round part) to make room for special filter material. The wide pores of the filter foam ensure effective biofiltration. This package contains 2 Bio Filter Foam Cartridges.
 Dimensions
 185 x 175 x 35 mm