Suitable for bar chairs, workplace swivel chairs, automobile seats, reveal stands and more.Strong load-bearing capacity, demanding to deform or squeezeCan rotate 360 levels freely and smoothlyUses a quarter-inch ball to avoid noise.Material: galvanized sheetOptional diameter: three inches--71*71mm 4 inches--94*94mm 6 inches--155*155mmBearing Rotating Swivel Turntable Plate