18-166 isn't strong enough

A quick learner from FL says:
August 4, 2014
I have used the 18-166 to replace the broken ones, however, it seems that the plastic 18-166 was not strong enough. Can I use Aluminum Top Sash Guide, 18-010? or if you have other better ones.

Thanks,
Vince
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Paul from SWISCO responded:
August 5, 2014
You might want to consider our 18-064 nylon top guide. The overall wall thickness is much heavier and the holes line up to 18-166. I think either the 18-010 or 18-064 would work for you.
5/8" Top Sash Guide, Kinco
5/8" Top Sash Guide, Kinco
18-166
$1.33
Aluminum Top Sash Guide, WT
Aluminum Top Sash Guide, WT
18-010
$1.97
5/8" Top Sash Guide
5/8" Top Sash Guide
18-064
$1.12
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