VEVOR Swivel Chair Base 28 Inch, Office Chair Replacement Base 320 Pounds, Office Chair Base 5 Inch Stroke Length, Replacement Chair Base with Bottom Plate Base Cylinder and 5 Casters

VEVOR Swivel Chair Base 28 Inch, Office Chair Replacement Base 320 Pounds, Office Chair Base 5 Inch Stroke Length, Replacement Chair Base with Bottom Plate Base Cylinder and 5 CastersHigh-quality MaterialOffice Seat PlatePremium TubeSmooth & Quiet RollingComfortable & Ergonomic DesignOur AdvantagesLoad capacity: 350 lbs (cylinder rated); 320 lbs (seat plate rated); 110 lbs (caster rated),Adjustable height of cylinder: 100 mm/4 inch,Wheel casters diameter: 60 mm (2.4 inch),Product weight: 22 lbs,Base size: 28",Color: Black,Material: Metal/Plastic,Mounting hole pattern: 6" x 10" / 15.2 x 25.3 cm