Feature: 1. Mini body, extra lightweight, long service life. 2. Provides fish tank more tiny bubbles and more oxygen than other products. 3. Work together with an air pump(not included), make no noise. 4. Professional design with adjustable cover, the bubble size can be adjusted according to the power of the pump. 5. Fits for 5mm inner diameter tube(not included). 6. Extra lightweight body with long service life with adjustable cover.the bubble size can be adjusted according to the power of the pump 7. Provides fish tank more tiny bubbles and more oxygen than other products 8. Work without noise,work together with an air pump(not included) 9. Fits for 5mm inner diameter tube(not included) 10. After-Sales Guarantee: Galapara assured after-sales guarantee, 30 days money back guarantee. Specification: Features: Mini body, extra lightweight, long service life. Provides fish tank more tiny bubbles and more oxygen than other products. Work together with an air pump(not included), make no noise. Professional design with adjustable cover, the bubble size can be adjusted according to the power of the pump. Fits for 5mm inner diameter tube(not included). Specifications: Color: Black Material: Plastic Item Size: 6 * 3.5 * 3.5cm/ 2.4 * 1.4 * 1.4in Item Weight: 12g/ 0.4oz Note: The diffuser requires an air pump and airline tubing to work together. This pack includes the diffuser only. Package List: 1 * Bubble Increaser Package List: 1 * Bubble Increaser