Made of high-quality materials, more durable.The high-standard material make this water tank to be durable. It is recommended to use each spare part for six months, and then replace with new spare parts. Timely replacement of parts will help your robot vacuum cleaner maintain good cleaning performance. Suitable for Xiaomi Dreame F9 vacuum accessories robot vacuum cleaner. Colour: picture color Material: plastic Package Contents: 2 * Water Tank Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.