Overhead Door Model 521

Electric operator or chain hoist
Bottom sensing edge
3″ track
Bracket mounting (not available on full vertical door tracks)
Exhaust ports
Polyurethane insulation available in the rails and stiles
– R-value up to 4.1 depending on glazing choice
Higher-cycle springs in 25k, 50k, 75k, 100k cycle
Four-section pass door
Finish options:
– Bronze anodized
– Select from 197 standard powder coat colors or colored to match specification

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