LapWorks Big Screen TV Swivel with 21x16 inch Base and Steel Ball Bearings - holds 200 Pounds Specifically designed for big screen TVs whose base is longer than 16, but under 22". Our new extendable 4K TV Swivel works with larger TVs and TVs with 2 legs requiring a width of 36" and larger. Provides excellent stability and maneuverability for left to right viewing up to 10,000 rotations Rotates on 24 steel ball bearings - supports evenly distributed weight loads up to 200 Lbs. No assembly required. Just place your TV's base on the swivel. It's uniquely shaped to match the straight or round edge of a TV base designs Measures 21.65" long by 15.94" wide by 1.375" thick so it can support just about any large screen TV