Shenzhen Wehappy Technology Development Limited Company is a leading and professional manufacturer of HP compatible inkjet cartridges in China. All of our products are produced in close, dustless and clean plant. The ink we used are all imported from USA with the entire automatic ink infusing equipment and through repeatedly experiment to insure its consistency and stability, all of our finished products are entirely made by tailor-made specialized equipment and international advanced technologies, in order to ensure every of our products? quality to attain class A, the printing effect of which really could compare with the original! Our company adopts special technology and specialized equipment to insure its color and printing effect could compare with the HP original. In order to guarantee the quality of our products, all of our finished goods have passed printing test and attain class A. We have made the special clamp to fix the chip of the cartridges and strengthen the stability during transportation, meanwhile, we vacuumize the plastic package to maintain our products? high qualities during air express. We guarantee for exchanges or money back for any quality problems.