Upholstery double cone springs, 12 Gauge for Seat Sofa Mattress Size 4" x 3.5"
Upholstery Cone Coil Springs for Sofas, Arm chairs, Chairs or Seating of your choice. In grey steel, very firm 12 gauge and reasonably clean. 12 Gauge, 10.2 × 9.1 mm, 12 units suitable for all types of furniture.