Perfect breeding and hiding cave for shrimps, made of burnt clay. Two sizes: Medium - is stacked with 3 cylinders on the base, then two and then one at the top. Overall size is 4 x 4.5 x 5 cm. Large starts with 4 cylinders at the base and then moves upwards to three cylinders, then two, then one. Overall size is 6.5 x 6.5 x 5 cm.