Features: High-quality glass, PC material, high light transmittance, more beautiful to use. Can be used as carbon dioxide diffuser and bubble counter, microporous atomization. Small size, suitable for small and medium-sized water tanks, one-piece structure, smooth, high-gloss and transparent, easy to install. Flat bottom design, beautiful and convenient, can be placed vertically or horizontally. Add ceramic stone black technology to make ceramics smaller and denser, and improve the uniformity of CO2 distribution. Specification: Material: glass+PC Size: as picture shown Color: high transparent Package Includes: 1pc Notes: Please allow minor errors due to manual measurement. The colors may be a little difference for the different monitor display.