Magnetic higrometer/termometer holder

This is a magnetic holder for a small, popular rectangular hygrometer and/or thermometer. It fits devices measuring 45x25 millimetres (the pocket is 46x26 mm). 

It is useful for installing a hygrometer in a transparent filament box.

Pockets for small round magnets 5mm in diameter and 2mm high. Fitted very tightly.

No support or brim is required.