Product Name: EE55B Vertical Ferrite Core Transformer Bobbin 11+11Pin Type: EE55B ; Pin spacing: 5mm/0.2''; Row spacing: 35mm/1.4"; Ferrite core Size: 55.5 x 20.5 x 28mm/2.2" x 0.8" x 1.1"(L*W*T); Bobbin size: 61 x 42 x 60mm/2.4" x 1.6" x 2.4"(L*W*H).