Cheap hygrometer black

Inexpensive black spring hygrometer that attaches to the inside of the cellar using a magnetic adhesive attachment provided.. . colors: chrome black and white. . material: metal and plastic. . specificities: spring hygrometer. to be fixed inside the cellar (magnetic adhesive fixing provided). pre - calibrated no additional handling required. . dimensions: inner diameter x thickness (cm). 3.8 x 0.7cm. . outside diameter x thickness (cm). 4.5x1.8cm