Features: Wide Application: This water filler can be used to add water in aquariums and improve fish living environment. The Aquariums water changer features fully automatic start and stopping, no electricity required. Adjustable Valves. Suitable for both for water and marine water. Hand-tightened screws, the valves can also be used for water system . Spend less time worrying about water level. For fish enthusiasts of all level, this water changer is perfect for both recruit and experienced hobbyists. Specifications: Material: Plastic Size: (Please Refer to the Pictures for More Details) Type: 2 Option Suitable Glass Thickness: Less than 15mm Package Includes: 1 Set Auto Water Filler for Aquariums note: 1.Please allow 1-2cm errors due to manual measurement, note that you donot mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.