Professional-grade torsion springs for sectional and roller garage doors. Available in multiple weight capacities from 45kg to 100kg with industry-standard DASMA color coding for easy identification. Each spring features precision winding with color-coded cones (Red for left-wound, Black for right-wound) ensuring correct installation. Built from high-tensile oil-tempered steel wire for 10,000+ cycle lifespan. Essential replacement part for maintaining smooth, balanced garage door operation. Always replace springs in pairs for optimal performance and safety.