The toner Cartridge I received does not work with my Dell 1125. I've been trying for about an hour and no luck. First problem was the handle on the cartridge holder inside the printer wouldn't lay down flat with this new toner. I ended up removing the handle so that the front door could close, but then the printer just says "invalid cartridge, no toner found". I eventually jimmy rigged it so that the handle could be on the cartridge and the door would still close, but I got the same error message no matter what I tried. So this cartridge is definitely not shaped correctly to fit, and may also have a bad chip because when you can get the door closed it still gives an error.