History----Since 1999, Wah Hing Tech Co is one of the leading suppliers for cartridges in china. With ISO 9001 certified, our main components are from high quality suppliers oversea like Japan and Korean，which ensure our cartridges have high quality guarantee. Our pricing policy is at medium to low level, so as to make sure customers will have their profit margins at the utmost level. Defect rates & Replacement goods policy----our Epson and Canon compatibles are less than 0.05%, black HP, Lexmark, and toners are less than 2%, color HP, Lexmark and toners are less than 3%. If any bad goods happen, we carry on one to one exchange policy, to replace them one to one for customers in next order delivery.