2set EI28 13+13pins 5+5pins 6+6pins PC40 Ferrite Cores and bobbin
We use the Polyethylene foamed sheet to protect the ferrite cores and bobbins, then use the air column, don't worry!
EI28 Ferrite Cores
AL=3500±25%
"E" core size(mm):
A: 28.0±0.6
B: 16.7±0.3
C: 10.7±0.3
D: 7.3±0.3
E: 18.6min
F: 12.2±0.3
I: 3.5±0.2
each set =2 ferrite halves + 1 bobbin