The Shepherd Hardware 6-inch wide 5/16-inch thick lazy susan turntable bearings are for turntables with a diameter between 15 and 30 inches. The bearings are zinc-plated for corrosion resistance, and have a load capacity of 500 pounds. It has a 6-inch square plate.

Zinc-plated for resistance to corrosion
Load capacity of 500 pounds
Six-inch square plate
Ball bearing raceway for smooth rotation
Mounting screws not included