Other than those specified in the product description, this power supply does not match the MacBook Air. This is too shallow, so that the power supply plug rests and dissolves immediately. The flaps for winding up the cable are much more difficult to move than with my old PSU. The cable has dirt, giving the impression as if it had already been used once. In addition, my gaps appear sth. Too big and also the adapter to German outlets has the odd little quirk.
All in all, I suspect that here defects copies be brought for half price at the man.