Feature:1. This auto‑top‑off system is easy to install on to your aquarium sump. Can meet 16/12 water tube.2. Float valve for manual adjustment, no other tool, no metal screws, no corrosion.3. The bracket is made of high quality material, stable and heavy enough, not easily knocked.4. It can be installed on the bracing tank and the wall of the fish tank. The water level adjustment float replaces the bracket adjustment. There are three installation methods, which are simple and convenient.5. This water filler is specially designed for filling water for aquarium or fish tanks in order to replenish those evaporated water and control the water level and prevent those aquarium creatures form dying due to the lacking of water. Specification:Condition: 100% Brand NewItem Type: Auto Water FillerMaterial: Acrylic, PlasticColor: As shown in the pictureAssembly Length: Approx.150mm/5.9inAdjustable Height: Approx.80~140mm/3.15~5.51inFloating Ball Size: Approx.40x56mm/1.6x2.2inWeight: Approx.72g/2.5ozApplication: Automatic tank refillPackage List:1 x Set Auto Water Filler(5pcs Parts)Note:1. Please allow 1-2cm error due to manual measurement. Thanks for your understanding.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.3. Please kindly note that you will receive several of spare parts, you need to assemble by yourself.