GD12227 Size: 0.22" x 1.75" x 20" Most doors, in recent years, have been supplied with torsion springs, located directly above the door and mounted to the header. Replacement will require the use of 2- winding rods (GD-52238) and a clear understanding of wire size and handing. Features: -Torsion spring. -Spring type: Torsion spring. -Inside diameter: 1.75". -Size 0.21" x 1.75" x 18": Silver color code, 3.25"H x 4" W x 35" D. -Size 0.22" x 1.75" x 20": Blue color code, 3.25"H x 4" W x 35" D. -Size 0.22" x 1.75" x 20": Blue color code, 3.25"H x 4" W x 35" D. -Size 0.24" x 1.75" x 32": Red color code, 3.25"H x 4" W x 35" D. -Size 0.24" x 1.75" x 32": Red color code, 3.25"H x 4" W x 35" D. -Size 0.25" x 1.75" x 32": White color code, 3.25"H x 4" W x 35" D. gd12224 Installation gd12227 Installation gd12226 Installation gd12229 Installation gd12228 Installation gd12231 Installation gd12230 Installation gd12233 Installation gd12232 Installation gd12235 Installation gd12234 Installation