Aquarium Decoration -Aquarium Bubble Disc Highlights Generic Brand Aquarium Bubble Disc Description: Brand new and high quality bubble diffuser oxygen plate for aquarium pump. Creates bubbles in the aquarium when attached to an aquarium pump (pump is not included). Easy to install, just attached to an air pump. Good for aquatic plants, CO2 is the key point for a healthy planted aquarium. Helps increase oxygen levels, water consumption and improves water quality. Specification: Material: Calcined Stone + Plastic S Diameter: Approx. 2.8cm/1.10inch Thickness: approx. 1.1cm/0.43inch M Diameter: approx. 3.8cm/1.50inch Thickness: approx. 1.3cm/0.51inch L Diameter: approx. 6.3cm / 2.48inch Thickness: approx. 1.3cm/0.51inch XL Diameter: approx. 10.2cm/4.02inch Thickness: approx. 1.0cm / 0.39inch Package Includes: 2 Pieces Air Stone Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.