Are you looking for a professional, yet affordable oxygen plate? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? If yes, look no further Our professional oxygen plate must meet you needs. It is one of the best choices for you. Features - Color: As shown. - Size: 20 x 20 x 2 cm. - Material: Synthetic material. - The first use If the gas volume is not uniform or not gas, please confirm that it is a stop problem or the oxygen pump power is not enough. - For long-term use, if the amount of bubbles is reduced, it can be taken out and washed repeatedly. - It breathes out evenly and has a better effect. - The product is durable and has a long service. - It can make a large amount of air at the one time to meet the aquarium demands. - Dear buyer, due to lighting effect, monitor's brightness, manual measurement, 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