Material:Ceramics Detailed Size: L10cm(3.93") W6cm(2.36") H4.5cm(1.77") (It's manual measurement, there may be a little error.) Feature: Multi-Function Beer amid, Breeder, Shelter, Filter, Decoration. Special design for the existence of African cichlids. Design a natural lining environment for the shrimp to shelter or to generate. Use small thread to bundle the moss on the product constitute a nature living environment. Specially made with ceramic material that possess filtration function for aquarium. Included Package included: