Product Features: 1. Made of high-quality plastic, practical and durable, universal fish tank filter accessories. 2. Easy to install and use, just fix the holder on the glass with suction cup and install the pipe on the bracket. 3. The tube can be firmly fixed to prevent slipping, prevents the CO2 pipe or air tube from being bent. 4. Can be used either individually or by attaching to the glass wall of a tank, high performance. 5. Precise hole position, complete functions, portable and lightweight, environmentally friendly.