4 (2 pairs) FX3599 ferrite transformer cores 45.5mm x 14.6mm Mullard

You get 4 FX3599 ferrite transformer core half's  the outside diameter is 45.5 mm the height is 14.6 mm  the space for the coil former is 20.2 mm inner and 37.5 mm outer. The weight of each half is about 68 grams. We do not have any data or the accessories for these.