very very well packed, absolutely save.. breaking of the brittle sendust-rings are therefore impossibile !! :-)
HAM mesurements: Al = 0.21µH@2MHz to 5MHz. Usable as a voltage balun from 160m up to 40meters. Unsuitable as a current balun. I ordered 2 rings, they have almost identical characteristics. They were very wel protected and very fast delivered. I recommend this seller.
Mesurement passage short wave band with 2x3 windings