Listing is for one ( 1) Service Caster Series No.30 swivel caster with a 8" diameter by 2" wide silver v-groove semi steel cast iron wheel and bronze wheel bearings with a top lock brake & bolt on swivel lock capable of supporting 1,250 lbs./caster. When searching for a reliable and durable solution for heavy duty projects, consider Service Caster's Series 30 top plate semi steel cast iron v-groove wheel casters. The Service Caster Series No.30 v-groove wheel is designed to roll on 45 degree angled track, and also has a flat face suitable for non-tracked use. The semi-steel cast iron wheel is built to withstand high capacity, heavy loads up to 1250lbs and in temperatures up to 600 deg F. An economic choice over steel, semi-steel wheels are abrasion resistant and rugged. Finely crafted with double ball bearing heat treated raceways, these versatile casters are ideal for a wide range of applications specific to high capacity tracked workflows, but also for dollies, platform trucks, warehouse carts and freight terminals. Or ensure a smooth and secure ride for industrial and commercial equipment. Even drywall carts, welding carts, and wall panel carts will be ready to roll on the Series 30, keeping you moving forward. Specifications Color: Bronze. Caster Type: Swivel. Mount Type: Plate. Material: Semi Steel Cast Iron. Wheel Size: 8". Capacity: 1250 lbs Capacity per Caster. Dimension: 7.5" H x 12" W x 12" L. Weight: 12.75 lbs.