Feature: 1. FINE BUBBLE: Aquarium air stone disc creates a large number of fine bubbles in the fish tank, fine atomization, more efficient air cleaning. 2. EASY TO CLEAN: Aquarium air stone disc bubble diffuser is easy to clean, cleaning effect is efficient and easy to use. 3. OXYGENATION: Aquarium air bubble stone has high efficiency of oxygenation, providing oxygen to aquarium quickly. 4. REUSABLE DESIGN: Aquarium air stone disc bubble diffuser release tool is easy to clean , after use can be cleaned and used many times afterwards. 5. WITH SUCTION CUPS: Aquarium air stone with suction cups, strong suction, can be firmly adsorbed in fish tanks and aquariums. Specification: Item Type: Aquarium Air Stone Disc Material: Air Bubble Stone, Stainless Steel Diameter of Connecting Hose: 4mm/0.16in Applicable Fish Tank: ≤80cm/31.5in. Package List: 1 x Aquarium Air Stone Disc 1 x Check Valve1 x Tube1 x Suction Cups1 x Adjustment Switch Note: All data are measured manually, and there are certain errors in the measurement results.