110uH inductor spool

Spool for winding 110uH inductor, which is used to shorten ham radio antennas. Value used especially to get 80m band from 20m long EFHW antenna wire by only adding 2m of wire .
When using 0.5mm thick enameled wire and winding the spool full, you get just over 110uH.
There are three small holes in both ends to put the magnet wire through and locking it in place. Two other holes are for suspending and antenna wire.