The Ultra-Tow Spring Axle Kit features durable welded spring seats with double-eye springs for smooth-riding comfort. Complete axle kit includes springs, shackles, U-bolts, hangers, hubs and hardware. Also includes castle nuts, cotter pins and washers. Capacity Complete Axle Kit, 67in. Spring Center, 4-Bolt Pattern, 4in. Northern Tool Item# 48180. 66.0000 lb(s). All orders will contain an invoice/receipt. IMPORTANT: We will not honor requests to remove invoices or receipts from packages. If a PO box address is submitted without a physical address it may delay your order. We may already have an answer to your question! We reserve the right to correct ad errors and/or omissions. Pricing and availability is subject to change without notice.