Replace your trailer's worn, sagging leaf springs with new springs from Smith. Trailers are built for a multitude of purposes and the springs under them come in a variety of shapes and sizes with load capacities to match the capacity of the axle and what's being hauled. Order the same size and capacity springs that you are replacing. Note your spring style, double eye or slipper. Measure the length, width, height and count the leaves. Eyes take 9/16" Shackle bolts. 25.625" Length Eye center to end. 1-3/4" wide Height 5" Capacity 1000 lbs. 4 Leafs