Features: 1.This auto?top?off system is easy to install on to your aquarium sump. 2.Float valve for manual adjustment, no other tool, no metal screws, no corrosion. 3.Comes with a O?ring, can meet 16/12 water tube, don't leak. 4.It is suitable for the aquarium which is under approx. 15mm /0.59in thickness. The adjustable range of water level is approx. 0.5?15cm /0.2?5.9in . 5.The bracket is made of high quality material, stable and heavy enough, not easily knocked. Specification: The auto-top-off system is easy to hang on to your aquarium sump, it can automatically fill and shut off inlet water. you make it fit a wide variety of positions and heights._x000D_ _x000D_ Features: _x000D_ 1. This auto-top-off system is easy to install on to your aquarium sump._x000D_ 2. Float valve for manual adjustment, no other tool, no metal screws, no corrosion. _x000D_ 3. Comes with a O-ring, can meet 16/12 water tube, don't leak._x000D_ 4. It is suitable for the aquarium which is under 15mm thickness. The adjustable range of water level is 0.5-15cm._x000D_ 5. The bracket is made of high quality material, stable and heavy enough, not easily knocked._x000D_ _x000D_ Specification:_x000D_ Item Type: Aquarium Auto Water Controller_x000D_ Material: Acrylic + Plastic _x000D_ Item Color: As Pictures Shown_x000D_ Float Valve Size: Approx. 4 x 5.6 cm / 1.6 x 2.2 inch_x000D_ Package Weight: Approx. 66 g _x000D_ _x000D_ Package Include: _x000D_ 1 * Water Filler_x000D_ 3 * Accessory_x000D_ 1 * Bracket_x000D_ _x000D_ Note:_x000D_ Please allow 1-2 cm error due to manual measurement. Please make sure you do not mind before you bid.