Toroidal transformer We have various torodial power transformers available, from 5va to 20kva. We accept both oem and odm business, with no minimum order quantity required. Delivery schedule is 7-28 days, depending on quantity, and design time is included. The size (outer diameter) of our power transformers range from 50mm to 360mm, with height from 40mm to 215mm. Our products have obtained the certificates including iso9001, cesi, ce and rohs. And we are trying to get the certification of ul. Please don't hesitate to contact us for further information. We always welcome you at any time. According to products