Efficient Water Management: Utilize this automatic water replenisher's differential pressure principle for precise positioning and consistent water supply, ensuring optimal hydration levels for your aquatic pets. Durable Plastic Construction: Crafted from high-quality plastic materials, this fish tank hydrator guarantees long-lasting durability, providing a reliable solution for maintaining a healthy aquatic environment. Easy-to-Use Design: With a simple structure and user-friendly operation, this automatic water replenisher offers convenience and efficiency in managing water levels in various fish tanks, simplifying your maintenance routine. Adjustable Water Level Functionality: Accommodate different wall thicknesses of fish tanks effortlessly with the ability to adjust the water level, catering to diverse tank setups and ensuring flexibility in usage. Compact and Versatile: Measuring 7.5 cm in length, this automatic water replenisher is suitable for a wide range of fish tanks, offering a space-saving solution while enhancing the overall functionality of your aquarium setup. Item Name: Water Replenisher Material: Plastic Features: Water Level Adjustment, Fish Tank Accessories, Easy to Install Size Details: L: 7.5cm/2.95", W: 4.5cm/1.77", H: 2.5cm/0.98" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: A: 1 x Water Replenisher 1 x Long Tube 1 x Short Tube or B: 1 x Water Replenisher 1 x Adapter 1 x Long Tube 1 x Short Tube