Extension spring replacement
That means original extension springs instead of torsion, single-bulb photo-eyes bolted on as an afterthought rather than built into the frame, and steel rollers with no bearing at all. We carry replacement extension springs sized for those older single-piece and sectional doors, torsion conversion hardware for owners who want off the ancient extension setup entirely, modern photo-eye sensor pairs that meet current safety code, and sealed ball-bearing rollers that don't need the yearly grease job the originals demand.
