1 Ton Full Floater End Cup Kit Designed to press fit onto the Spider 9 housing;3-1/2 OD tube;Accepts the Spidertrax Ultimate Unit Bearing (mounting hardware included);Each cup has an integrated caliper mounting tab Spidertrax Offroad Spidertrax Offroad 1 Ton Full Floater End Cup Kit - UEC002 UEC002 Axle Housing Ends