Häfele 926.39.910 Standard Weight - Spring Hinge, LH606SH, 652 matte chrome-plated (US26D), Width x depth: 4 1/2” x 4” (114 x 102 mm)

Use 2 spring hinges on fire doors, center and bottom location. All other applications: up to 70 lbs., 1 spring hinge with 2 ball bearing hinges, spring hinge in center, up to 90 lbs., 2 spring hinges with 1 ball bearing hinge, spring hinge in center and bottom, up to 120 lbs., 3 spring hinges.