New Trailer Leaf Spring-4 Leaf Double Eye 1750lbs for 3500 Lbs Axle One 1,750lbs capacity leaf spring, for standard 3,500lbs trailer axle, Eye to Eye length: 25-1/4", Free open: 3", width of leaf: 1-3/4", 4 leaves, 9/16" bushing dia It will replace SW4B / 72-42 / LIB-401-DE / UNA212 / PR4B / 124903 / 9150014 / 93184 (different SKU# but same spring)