Materials: These bearings are made of durable metal galvanized sheet materials. It has good tolerance, is quiet and flexible and fulfills the function of weight bearing. It has enough beads inside, which meets the flexibility of the turntable.<br> Usage: The square rotary plate is a good tool for furniture assembly, DIY, your own decoration, home-made machines and creativity. It is suitable for various furniture, bar stools, swivel office chairs, car seats, display stands, etc.<br> Practical: For the design of the round grooves for bearing and support, multiple grooves can meet the needs of different objects. The 360 spherical carrier rotor is equipped with support elements to maintain separation and reduce excessive friction without damaging the floor without damaging the floor.<br> Size: 15.5 x 15.5 cm/6 x 6 -inch (LW), the square , the height of 0.8cm/0.32inch, enough load capacity and enough beads to ensure smooth rotation without noise.<br> Package includes: 2pcs 15cm square hollow rotor (excluding screws).