Air Bubble Disk Stone Aquarium Aerator Fish Tank Pump Hydroponics Oxygen - 20cm RC Model Vehicles & Kits Durable and Compact: Constructed from

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Air Bubble Disk Stone Aquarium Aerator Fish Tank Pump Hydroponics Oxygen - 20cm RC Model Vehicles & Kits Durable and Compact: Constructed fromDescription: Diameter 10 13cm air stone disk suitable for 0. 16" 4mm inner diameter tube Diameter 20cm air stone disk suitable for 0. 31" 8mm inner diameter tube Please verify the size you need, and we do not accept returns due to the size of the interface Safe & High Quality Material: The air disk uses finely compressed material so the bubble is small, non toxic mineral material keeps fish healthy and safe How to Use: To connect to the air hose and