1、3 impeller water flow meter helps you observe the speed and working status of the water flow. 2、Made of high-quality acrylic material, durable to use. 3、Polished surface treatment enhances cutting characteristics and prolongs service life. 4、Self-adhesive seal, easy to install and use. Features: 3 impeller water flow meter helps you observe the speed and working status of the water flow. Made of high-quality acrylic material, durable to use. Polished surface treatment enhances cutting characteristics and prolongs service life. Self-adhesive seal, easy to install and use. Specifications: Type: Square 3 Ways, Square 2 Ways, Half Circle 2 Ways (Optional) Color: Transparent + Green Material: Acrylic Screw thread: G1/4 Interface diameter: 12.9mm Surface finish: Polishing Sealing: Self-adhesive Size: Approx. 39 x 39 x 23mm / 1.6 x 1.6 x 0.9in Package weight: 29g Package List: 1 * 3 Impeller Flow Meter