This purchase is part of a set of 3 cartridges ordered from AMAZON. This was not sufficiently clear is that the three cartridges were delivered to me independently of each other! 1 - It took me almost 15 days to get all of my order 2 - The free shipping is good, but do not switch into absurdity. 3 - I am ashamed when I think of the impact of shipping on the environment ....