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*Free Shipping Excludes: International Shipping, Doors, Operators with rails and high cycle trolley operators |
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Used on torsion or extension spring doors up to 8' high
Operate an extension spring door in a minimum of 7" of headroom
Door won't go higher than top of spring shaft when door is opened.
Double track not required
Must cut and remove portion of vertical track for full clearance
Used at initial installation or easily add when needed
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