Specification Color:White Material: ceramic, ABS Stone diameter: 50 mm Overall diameter: 70 mm Stone height: 26 mm Inlet height: 39 mm Applicable pipe inner diameter: 4 mm Note: Please use it by connecting the air pipe to the oxygen pump. Before use, it is best to soak it in the fish tank for two hours. 1.Ideal for your fish tank or aquarium, it is the best partner for air pumps. 2.Instantly create a large number of tiny bubbles that your fish will like. 3.Equipped with suction cups to generate huge force and firmly adhere to the glass surface. 4.Using special ceramic materials, sintered in a high temperature furnace at 1350, it is sturdy and durable. 5.A large amount of dissolved oxygen produces fine and abundant bubbles during the day and absorbs carbon dioxide at night. 6.Durable and reusable. When there is dust clogging or air bubbles decrease, it can be taken out and cleaned. 7.This product is used to add oxygen to the aquarium. Please use it by connecting the air pipe to the oxygen pump (not including tw Notes: Due to different displays and lighting effects, the actual color of the product may be slightly different from the color shown on the picture. Thanks! Due to manual measurement, please allow 0.1-0.2mm slight measurement deviation. Packaging Contains 1 x Air Stone 1 x suction cup 1 x control valve