Listing is for one (1) 8" x 2" Semi Steel Swivel Caster. 8 inch Steel wheels comes with a roller bearing installed and zerk axle for easy access for your grease gun if you plan on re-greasing the bearings over time. We have zerk / grease fittings installed in the wheels hub, raceway of caster, and zerk axle giving you multiple grease access points. 8"x2" Steel Swivel Caster holds 1,250 lbs per caster making this a medium to heavy duty application caster. Our casters are manufactured with high strength steel and raceway and bearings are heat treated. Top plate size: 4" x -1/2" ; Bolt hole dimensions: 2-5/8" x 3-5/8" to 3" x 3"; Load height: 9-1/2". These casters are great casters for many applications including, carts, dollies, drywall carts, commercial and industrial equipment, panel carts, welding carts, warehouse carts and platform trucks.