Tohita Development Co. Ltd is specialized in R&D, production and sales of re-manufactured copier toner cartridges and drum units for OKI, Xerox, Ricoh, Kyocera Mita and Konica Minolta. Till now, we have 20 professional research staff and engineers who have been engaged in this field for average of eight years. And the testing will be made for each product before packaging so as to assure the quality. We have prescription matching test, raw material test, 100% printing test and random test. So, product defective rate is less than the average level of the industry.