These axles are designed for off-road and circle track racing applications that utilize the 14-Bolt style full floating type hubs. The 40-spline drive flanges are manufactured using aircraft quality alloy steel and are heat-treated and black oxide coated. The axles feature true involute splines, are heat-treated, polished, and shot peened. The center section spline is available for any spool / carrier requirements. These parts are designed to work with factory 1/2" axle hub bolts or studs.  Covers are anodized aluminum with low-profile sealing o-rings. The complete kit is comprised of shafts made from 300M material, flanges, caps and fasteners, o-rings, and retaining rings. Download Service Bulletin #0090 axle order form to help gather your dimensions. Pricing is for axles up to 31" long and per pair.