... 3.used for transformer 4.ISO&CE certificate plastic bobbin:EE type:1.Bobbin material is PBT2.Bobbin Features is High ... horizontal6.Slots are Single and multi-slot7.Bobbin range are EE, EEL, EI,EC,EF,EFD,ETD,EPC,PQ,RM,UU ... ,please feel free to inquire us at any your convenience EE type transformer plastic bobbin