Eheim MECH pro is a mechanical filter material. The material is manufactured from non-recycled plastic, it is completely water neutral. The unique spiral shape ensures excellent trapping of even small dirt particles in the aquarium water. High quality plastic ensures easy and residue-free cleaning. Eheim MECH pro can be resused for several times. The ribbed surface structure of Eheim MECH pro also allows the colonisation of bacteria which break down toxins, thus guaranteeing an additional biological water cleaning. Eheim MECH pro ist the perfect solution in combination with Eheim Substrat pro or bioMech.Eheim Mech pro:-mechanical filter material-dimensions: length: approx. 1.0 cm, diameter: approx. 0.8 cm-can be reused-easy to clean