AlSide Window Latch

A handy person from MIchigan says:
I am confused on the inner/lower vs outer/upper on the 26-335 latches. The dimensions fit my older AlSide window, but i only need two per window. Are all 4 of these in the set the same dimensions (2 for right and 2 for left)?
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Donna from SWISCO responded:
The inner/lower window sash pair and outer/upper window sash pair of latches are the same dimensionally but they have different shaped latch tongues. See the product page for 26-335 to view the close up images showing the two shapes.
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