Q. What Powder filled in the cartridge ? A. For Hp mono color, we usually fill TTI, HANGUANG, YDLG powder. For Samsung is Tomogawa. HP color cartridge use Mitsubishi and DingLong powder and Mi Q. What's the warantee of toner cartridge A. We offer 24 months for stock and unconditional replacement or refund for defective our defective for black cartridge is within 1% and for color cartridge is within 2% Q. What's the page yield, density? A. We made our toner cartridge according to original standard. Density 1.45 Q. How to send sample? A. we send sample by courier ,usually DHL, Fedex to guarantee prompt delivery. We also can send to your forwarder as your requirement. Q. How to control and guarantee excellent quality A. we have over 10 technicians ,there is strict test for materials purchased, cartridge is tested on production line one by one, and Q/C will check quality again before leaving factory Q. How many toner cartridges do you manufacturer each month? A. We have more than 200 workers and the monthly production capacity is 200,000 pcs of toner cartridge and we have the widest range of product in china, with more than 2000 models available, you will find TOSHING an excellent supplier for you! Q. What certificate do you have? A. We have ISO9001/ISO14001/CE/STMC/SGS Q. What's your delivery time? A. LCL shipment : within 7 working days 20GP: 10 working days 40GP/HQ: 2-3 working weeks Q. How to contact us? A. Do not hesitate to click and send your inquiry!