A. Function: The portable filter brush can quickly clean the dirt inside the filter element. And the rotary knob is convenient for users to adjust the water volume. This spa and hot tub filter cleaning tool is a useful maintenance accessory. It can extend the life of pool or hot tub filters and equipment. B. Dimensions: The portable pool cleaning brush is only 22 x 10 x 5 cm, compact and lightweight, easy to carry and will not take up much space. C. Adjustable: The pool filter brush fits standard garden hoses and can be connected to the water hose. There is also a rotary knob to adjust the water flow rate. D. Convenient: Our pool filter cleaner can easily remove debris and dirt so that the water flows independently. It can remove debris from the filter in seconds. It is designed to be compatible with most standard hot tub, spa and pool filters (except some filters). E. Description: It fits standard garden hoses. It has an ergonomic handle and plastic teeth for deep cleaning between filter pleats. It can extend the life of your pool and spa filter. F. Features: - Material: PVC. - Color: blue and black. - Dimensions (L x W x H): approx. 7 x 2 x 23 cm. G. Contents: 1 filter cleaning brush.