Choice Parts - Daybed, Trundle Bed, or Sofa Bed Replacement Springs (Pack of 8) (3-1/8") Super Strong Replacement Coil Extension Springs Strong and Sturdy with Just the Right Amount of Give Size: 3/4" Diameter x 2-1/2" or 3-1/8" Length (Including Hooks) Sold as a Set of 8 Replacement Springs Satisfaction Guaranteed