"X" Toner hopper works with HP 2420, 2430 ( Q6511) and P3005 (Q7551A) cartridges turning "A" into an "X". This is Universal X Hopper works for both 6511 and 7551. Includes both end caps, gears, mag roller bearing plate already greased, mag roller sealing blade installed, Toner seal installed (flexible like OEM). SKU: 800396