want a kind of professional and practical Fish Tank CO2 Diffuser? want to control the water co2 in your fish tank? This Fish Tank CO2 Diffuser will be your . Made of acrylic material, sturdy and practical for a long time using. Really practical and useful, suitable for fish tank and aquarium. Features -Color:Transparent -Material:Acrylic -Size:20.20X3.20X0.80cm/7.94X1.26X0.31in -Inner diameter: 6mm; external diameter: 8mm -The material is safe and durable, which is wear resistance and practical for the long time use. -Multi-scene use, this practical CO2 Diffuser Tube both fish tank and aquarium can be used. -This acrylic bend tube is also easy to install and operate, simple and convenient. -Light weight and compact size, which is easy to carry and store when not used. -The acrylic bend water can connect the and co2 well, practical and convenient. Package list: 1 x acrylic tube (15cm) 1 x acrylic tube (20cm)