Features: The air stone releases air bubbles smaller, denser, more uniform, help fish swim happily in aquarium. High dissolved oxygen rate and create even and tiny bubbles rather than a limited number of large ones. Safe, durable, Non-toxic material keeps fish healthy and safe. A must have for Hydroponic and Circulation system. Great tool for fish tank and aquarium which can creats loads of air bubbles, giving fish a good living environment. Specifications: Materials: Ceramic Size: 7cm/13cm/15.6cm/20.7cm
