Sytopia Office Chair Base Replacement 24'' - Office Chair Base with Reinforced Metal Legs 2600lbs, Bottom Part Universal Fit for Universal Gas Cylinder & Casters – Matte BlackUniversal Size: This 24'' office chair replacement base is suitable for most chairs on the market, including Herman Miller (office chair, study chair, desk chair, vanity chair). Casters: 7 16 inches x 7 8 inches (11 mm x 22 mm); gas cylinder: 2 inches (5 cm). High quality Craft Materials: Sytopia upgraded office chair base replacement features high quality chrome construction for enhanced durability. It offers an impressive carrying capacity of 2600