Track guide for Maxim Dual Arm

A handy person from Mill valley ca says:
December 7, 2020

Trying to find the wider piece that goes under the window frame know where the operator arm connect to. Can't find item anywhere on the site please advise.

Maxim Dual Arm Operator, Sill Mount

39-253L

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Bob from SWISCO responded:
December 9, 2020

Hello there. If you indeed have the 39-253LB Operator, then I think you might be referring tot he 39-529 Track Slide Piece. If not, please send pictures and we'll find something better for you. 
A handy person from Mill valley ca says:
December 9, 2020
Thank you!! That's the part. Appreciate the response
Truth Hardware Track Slider
Truth Hardware Track Slider
39-529
$1.20
Encore Dual Arm Operator, Sill Mount
Encore Dual Arm Operator, Sill Mount
39-253LB
$30.70
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