Gravel and Water Siphon Suction Cleaner for Aquarium Tank with Control Valve  

                         Features:
                           >.  Designed for easy removal of dirt from gravel and tank
                           >.  Portable and easy to use
                           >.  Control valve is include for flow control
                           >.  Control valve can connect 12mm internal diameter pipe
                           >.  Move the cylinder up and down quickly to create siphon
                           >.  Hose length : 15mm diameter x 2M long
                           >.   Cylinder size : 4.2cm diameter x 18 / 40 / 50 / 60 cm long