1、3 impeller water flow meter helps you to observe the speed and working states of the water flow. 2、Made of high-quality acrylic material, durable to use. 3、Polished surface processing amplifies cutting property and prolongs using life. 4、Adhesive type, easy to install and use. Features: 3 impeller water flow meter helps you to observe the speed and working states of the water flow. Made of high-quality acrylic material, durable to use. Polished surface processing amplifies cutting property and prolongs using life. Adhesive type, easy to install and use. Specifications: Type: Quadrate 3 Ways, Quadrate 2 Ways, Semicircle 2 Ways (Optional) Color: Transparent + Red Material: Acrylic Screw Thread: G1/4 Interface Diameter: 12.9mm   Package List: 1 * 3 Impeller Flow Meter