Dont use these guys

besides the 1 short cartridge, I asked if these are the right cartridges for my printer and was told yes....still 1 short I said let me just load these 3 for now and I can use it. None of the toners work.....all incompatible. I am then told theres no way of knowing which printer will accept these toners and which will not. Refund will take 30days