PREMIUM MATERIAL Made from galvanized steel, surface treated with zinc plated, corrosion-resistant and rust-proof. HIGH PERFORMANCE Ball bearing raceway for smooth rotation. Our swivel bearing has a deeper ball raceway to allow balls to move effectively and smoothly GOOD CHOICE FOR YOU All of our carousel turntable bearings use 1/4 inch balls for efficient operation and maximum stability of the mechanism WIDE APPLICATIONS It is suitable for using with revolving shelves in corner cabinets, turntable kaleidoscopes, tabletop serving, pop displays, magazine racks, movie poster displays, television and computer monitor turntables, flower arranging, cake decorating, revolving boxes color:silver size:9.5 x 9.5 x 0.8 cm The number of shipments: 2 Note: Other items are not included here, other pictures only show the effect Due to the difference between different monitors, the picture may not reflect the actual color of the item. Because of manual measurement. Please allow deviation. Thanks