... certficated factory -provide free samples EI type high frequency transformer/Switching power supply transformerKey Specifications/Special Features:Dimensions in mm (inches) : A, B ... , D=4 +/-0.5, E=5, F=28, Type=VEI-30: terminal pins=10, A=26, B=21.6, C=17 ... .3 +/-0.5, D=4 +/-0.5, E=5, F=30, Type=VEI-33: terminal pins=12, A=31.5, B ... =5 +/-0.5, E=7.5, F=60, Type=V Switching power supply transformer