- Polyurethane molded on cast iron
- Roller bearing in wheel
- Zinc-plated for corrosion resistance
- Double ball raceway with 5/8" Kingbolt
- Grease fittings on raceways and axles
- 4" x 4-1/2" top plate
HA4PS 4”: 800 lbs. Load Capacity 5-5/8" Overall Height
HA6PS 6” 1200 lbs. Load Capacity 7-1/2" Overall Height