2 Pieces hygrometer analog hygrometer mechanical round hygrometer humidity gauge for humidor cabinet cans, 2 inch Features: The hygrometer is applied for detecting the humidity of cigar, the error is within +/- 5%. Suitable for humidor, piano boxes, file cabinets, etc. Mechanical movement, no need to replace battery, can be applied for a long time. Round disk shape with a rubber ring on the back, can be directly embedded into the reserved hole of the cabinet, it also can be directly put into the humidor. Made of quality materials with reliable and upgraded design, practically does the work for you, durable and useful. Specifications: Material: alloy Diameter: 50 mm/ 2 inches Color: as pictures show Quantity: 2 pieces Package includes: 2 x Hygrometer