Features: Ensure optimaled 3D printing with our PETG Humidity Detection set, to effectively reduce moisture and protect prints. Black aluminum shell: mechanical appearance, good texture, highly printed products for durability. Digital mechanical dials: accurate measurement, timely feedback, circular designing, and clear data display. Tight packaging: the hygrometer+pneumatic connector is tightly installed with good sealing . It can be installed on tube: different from other hygrometers, it can be installed on tube, and the humidity detection is more accurate. Specifications: Size about 30x30x25mm/1.18x1.18x0.98in Component: Aluminum shell Package Type： 1 Module 2 Meter White/Gray Tube/ 2 Module 4 Meter White/GrayTube For PETG Package Includes: 1Set Humidity Detection Module note: Due to the problem of lighting effects, there is certain tolerances in product, please understand. Please allow 0-1cm error due to the measurement.