Description: High-grade polished stainless steel CO2 diffuser, durable as well as elegant, adding a beautiful scenery to your aquarium. Separate design, attach with a U shape connector, height can be adjusted freely and U-shape connecting tube can avoid blockage of CO2 flow. Helps to ensure plants receive proper amounts of CO2, improve the growth and health of your plants with sufficient CO2 supply. Notice: The CO2 diffuser may release big CO2 bubbles during its first 1-3 days of usage. When ceramic disc becomes saturated with water, it will then release fine CO2 bubbles, this is normal and may take up to 3 days. Each pack includes 1 piece CO2 diffuser, 1 piece U shape tube and 3 pieces suction cups. Specification: Material: Stainless Steel Co2 Diffuser Length: Approx. 6.5cm / 2.56inch Co2 Diffuser Head Diameter: Approx. 2.4cm / 0.94inch U-shape Tube Length: Approx. 4.2cm / 1.65inch Suction Cup Diameter: Approx. 2.7cm / 1.06inch Package Includes: 1 Piece CO2 Diffuser 1 Piece U-shape Tube 3 Pieces Suction Cup Note: Since the size above is measured by hand, the size of the actual item could be slightly different from the the size above. Due to the lighting effects, monitor settings,etc.There could be some slight difference in the color tone of the pictures and the actual item.