High-grade polished stainless steel CO2 diffuser, durable as well as elegant, adding a beautiful scenery to your aquarium. Ultra- , installed in the bottom can increase the efficiency of in water. An indispensable item for your fish tank or aquarium, durable and reliable. Features - Color: As shown. - Material: Ceramics and silicone. - Size: 3.1 x 3.1 x 0.5 cm. - High-grade polished stainless steel CO2 diffuser, durable as well as elegant, adding a beautiful scenery to your aquarium. - Replacement CO2 diffuser disc, high-density with silicon sealing ring, does not easily block. - An indispensable item for your fish tank or aquarium, durable and reliable. - It is easy to clean and replacement, very convenient. - Helps to ensure plants receive proper amounts of CO2, improve the growth and health of your plants with sufficient CO2 supply. - Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Package list: 1 x CO2 Replacement Slice