This listing includes a pair (2 pieces) of curved trailer center pivot equalizers, model EQ-356 (manufacturer part number: EQ-356-LOTOF2), with dimensions of 6-1/8" in length and 2-1/2". Designed to connect double-eye springs on tandem or triple axle trailers, these curved equalizers allow sufficient movement between axles to maintain a smooth ride and keep the load undisturbed. Each equalizer features 9/16" diameter bolt holes (center, left and right), tailored to fit 1-3/4" wide double-eye leaf springs with 9/16" spring eyes. The set includes bushings for added convenience, while shackle straps and center hangers are sold separately. Crafted as brand-new, unused, unopened and undamaged parts, these equalizers transfer load and sudden impacts between axles, distribute weight evenly, and help maintain stable trailer performance for daily use and long-distance towing. They are compatible with standard 9/16" suspension hardware for convenient installation.