The fish tank diffuser is made of sintered stone+ plastic, and it is safe and non-toxic. It can be used to add oxygen volume in the fish tank, which can keep your fishes safe and secure. <br> <br>Features: <br>High quality: made of sintered stone+ plastic, and it is odorless, safe and non-toxic. <br>The bubble stone can be used to add oxygen volume in the fish tank, keep your fishes safe and secure. <br>Fine bubble: the bubble stone can produce the small and fine bubble, and you can adjust the bubble size according to the switch. <br>The beautiful color bubble stone can match your fish tank, which makes fish tank beautiful and fashionable. <br>Easy to use: easy to install the fish tank diffuser, and convenient to use. <br> <br>Specifications: <br>Condition: 100% Brand New <br>Material: Sintered Stone+ Plastic <br>Color: Blue <br>Size: 5cm, 10cm(Optional) <br>Weight: approx. 139~506g/4.90~17.84oz <br>Bubble Stone Diameter Overall Diameter Fish Tank Size Suitable Pipe <br>5cm/ 1.96in 7cm/ 2.75in 50~120cm/ 19.68~ 47.24in 4*6mm/ 0.15* 0.23in <br>10cm/ 3.93in 13cm/ 5.11in 90~180cm/ 35.43~ 70.86in 4*6mm/ 0.15* 0.23in <br> <br> <br>Package List: <br>1* Bubble Stone <br>1* Suction Cup <br>1* Switch <br> <br>Note: <br>1. Please allow 0-2cm error due to the manual measurement. Thanks for your understanding. <br>2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.<br>1、High quality: made of sintered stone+ plastic, and it is odorless, safe and non-toxic <br>2、The bubble stone can be used to add oxygen volume in the fish tank, keep your fishes safe and secure <br>3、Fine bubble: the bubble stone can produce the small and fine bubble, and you can adjust the bubble size according to the switch <br>4、The beautiful color bubble stone can match your fish tank, which makes fish tank beautiful and fashionable <br>5、Easy to use: easy to install the fish tank diffuser, and convenient to use