Laptop DVD Burner Gt50n Sata Dvd-rw Optical Drive Replace with Gt40n Gt51n Gt60n Ts-l633 / Sn-208 / Gt30n / Gt50n / Ds-8a8s Fits for Lenovo G550 G470 G480 G450 G475 G485---lp306 GT50N SATA DVD-RW optical drives Fits for Lenovo G550 G470 G480 G450 G475 G485 replace with GT40N GT51N GT60N TS-L633 replace with / SN-208 / GT30N / GT50N / DS-8A8S Super Multi DVD 12.7mm Slim Internal SATA Drive