Professional for all toner cartridge part , ,they are close to original in looking and quality ... . 1. This is one of our toner cartridge part product : PCR , we use PU material as the ... , high temperature high humidity status . 3. The models we can supply is : HP Q2612, 435A, 436A, 388A, C3906, C7115,Q2613, ... EP-W, and so on .Welcome your inquiry , thanks ! toner cartridge parts