AmazonCommercial 3-Inch Transparent Swinvel Caster, Black, 5-Pack

Set of 5 heavy-duty low-profile swivel caster wheels (3-inch); ideal for a home computer chair, gaming chair, or executive office chair Nylon rubber and soft polyurethane wheels for safe performance on carpet and bare floors (won’t scratch or leave marks) Smooth, quiet gliding and swivel rotation; lockable for stay-in-place convenience Durable construction with dual oil-proof ball bearings and sleek industrial style