HIGH PERFORMANCE: Ball bearing raceway for smooth rotation. Our swivel bearing has a deeper ball raceway to allow balls to move effectively and smoothly PREMIUM MATERIAL : Made from galvanized steel, treated with zinc plated, corrosion-resistant and rust-proof. With the size 4" wide and 5/16" thick, for strength and durability 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 musical boxes GOOD CHOICE FOR YOU: All of our carousel turntable bearings use 1/4 inch balls for efficient operation and maximum stability of the mechanism GREAT SERVICE: We strive to provide you with the highest quality product and the best customer experience, if you're not entirely satisfied, please just feel free to contact us at any time,all the emails will be replied within 24 hours