DescriptionIf you are looking for a professional and affordable fish tank automatic water filler system, then your research is over here. That's because our product can meet your need. Adopted of premium material, it is practical and durable for long time use. It is not easy to get deformed and bring you much convenience.Features-Color: White, Blue -Material: ABS -Size: 3.60X3.60X3.50cm/ 1.41X1.41X1.38in - Engineering-grade ABS material, not afraid of corrosion, can be used with fresh water and sea water. - Clever use of the principle of differential pressure, easy placement and replenishment. - Suitable for sea tanks, fish tanks, turtle tanks, and aquatic tanks. - Equipped with three conversion slots, flexibly matching various wall thickness tank. - Slot fixation, the fish wall can bear the water bottle weight evenly.