Plastic part Compatibility: HP-Q6511X Plastic partCompatibility: HP-Q6511X suitable for 2410,2420,2420d,2420dn,2420n, ... pre-tested prior to leaving the factory.Stability quality, strong fuser film fixation, vivid color, lowers waste powder, no gray background, ... tested prior to leaving the factory.2. Stability quality, strong fuser film fixation, vivid color, lowers waste powder, no gray background ...