Hygrometer Disc

This is my simple hygrometer holder disc for Bambu or 70mm reel centres.The Hygrometer fitting can sit in either side leaving a Bambu Reel fitting or a 70mm Reel centre fitting.These were designed for a Simple Airtight Reel Container Box which can sit in its Holder with or without plastic bag, and could also hold a desiccant centre with or without the (round) hygrometer!