My glazing is slightly off from the 55-180-6

A landlord from Silver City, New Mexico says:
August 24, 2015
My old snap in glazing strip looks like your part #55-180-6 but the hook side measurement is 1/2 inch and the top width measurement is 5/16 inch. The other two measurements as show in your diagram for that part are the same as mine. Am I just being to exact in my measuring?
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Dave Sr. from SWISCO responded:
August 26, 2015
Take a look at our 55-120-6, instead. Could this be closer to your sample?
6' Snap-in
6' Snap-in
55-120-6
$9.77
6' Snap-in Vinyl Glazing Bead
6' Snap-in Vinyl Glazing Bead
55-180-6
$8.82
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