360-degree rotation: the seat swivel is located on the pre-lubricated ball bearing, and the entire track is circular. It can be rotated 360 degrees to meet your needs. Full bead design: The seat swivel features a full bead construction to provide a better user experience. Rotation is smooth, silent, and stable. Black coating: the seat swivel is made of 2.2mm thick black coated steel, offering high strength and corrosion resistance. Available in multiple sizes: Choose from three sizes: 6.29 x 6.29 x 0.86 inches, 7.07 x 7.07 x 0.86 inches, and 7.86 x 7.86 x 0.86 inches. Application: Suitable for use on various stools, bar stools, tables, chairs, and boat seats. Specifications: Type: Seat swivel Quantity: 1 piece Material: A3 steel plate Color: Black Steel thickness: 2.5mm / 0.1 inches Sizes: Approx. 16 x 16 x 2.2cm / 6.29 x 6.29 x 0.86 inches (L x W x H) 18 x 18 x 2.2cm / 7.07 x 7.07 x 0.86 inches (L x W x H) 20 x 20 x 2.2cm / 7.86 x 7.86 x 0.86 inches (L x W x H) Net weight: 1100g / 2.42lb 1400g / 3.08lb 1670g / 3.68lb Package includes: 1 piece seat swivel