Slipper Spring (2-leaf) - 500 Lb Capacity - 24-5/8 Inches X 1-3/4 Inches Wide - Single 2-Leaf Trailer Spring 500 lb rating per spring 24-5/8 inch x 1-3/4 inch wide - Free Arch 4-1/2 inches Equipped with plastic bushing - Inside dimension 0.562 9/16 mounting hole