Method of use: the bang sandwiched between two feet、 and then in the middle of the water balance of qi.You can begin to cut bangs、 want what slope、 debugging can also see their in the middle of the water column can know what is the slope<br />Material: plastic<br />Size: 16*2.5cm<br />Features: 1、 simple and easy to use、 save money to save time、 reduction of age<br />2、 anytime、 anywhere can be cut