Stability: The rotating swivel plate has a ball bearing raceway, enough beads inside the upper and lower square plate allow to allow the balls to move efficiently and smoothly. Function:All of our carousel bearings use 1/4 inch balls for efficient operation and maximum stability of the mechanism. Swivel Plate:Made of high quality galvanized steel, surface treated with zinc plating , resistant to corrosion and rust. Size: Approx.72 x 72mm.Thickness about 0.8mm.Load capacity 60kg, suitable for indoor or outdoor furniture assembly and handmade work. It is suitable for use with rotating shelves in corner cabinets, turntable kaleidoscopes, table tops, soft drink displays, magazine racks, movie posters, turntables. Ideal for corner cabinets,storage solutions, chalk spinners,kaleidoscope turntable,table serving,pop display,magazine rack, Movie poster display,TV decks and computer monitor,flower arrangement, cake decoration,rotating music boxes,living room displays. Our ball bearing set has two mounting plates, one for attaching to a stable surface and the other to provide a rotating plate. Surface treated with zinc plated, corrosion and rust resistant. Specification: Condition: new and high quality Material:galvanized steel Surface treatment:zinc plated Color:Silver Size:approx.72 x 72 mm Thickness: approx.0.9mm/5/16inch Maximum load capacity:60kg Package includes: 4 x Bearing for turntable