How about the Tongyang toroidal core rejection rate?

Tongyang has long been noted for its engineering excellence and commitment to quality. With an almost zero rejection rate, we rarely receive negative comments on our toroidal core and service. We handle returns on a case-by-case basis with the ultimate objective of making you happy.  It is our sincere desire that you experience complete satisfaction with your purchasing experience. We have done our best to match your purchase with your need.

Our premium materials ,advanced technology and craftsmanship can definitely ensure high quality ecw ferrite core. As one of Guangzhou Tongyang Electronics Co., Ltd.'s multiple product series, ef bobbin series enjoy a relatively high recognition in the market. Our quality control personnel are responsible for the continuous small changes to maintain production in the specified parameters and ensure product quality. It is able to handle much greater frequency than silicon iron. rh ferrite core has attracted many customers with its high quality assurance. It will not brittle or crack due to fast temperature change.

We drive the implementation of environmental protection policy. Take our internal footprint as an example, we have deployed appropriate clean technologies and have engaged all employees in continuous green improvements at the workplace.