RM6 ferrite core bobbin for audio transformer. Vertical RM6 4+4 pin bobbin. Bobbin Size=18.7mmX17.1mmX12.7mm. Parallel Distance=15.3mm. Pin Pitch1=5.1mm. Pin Pitch2=3.7mm. RM6 transformer has strong anti-interference and attenuation of low transmission, mainly used for PCB circuits, mobiles, printers, computers and other equipments.