Check the listing for details. Single Piano Caster/Wheel for Spinet/Console Back/Rear Vertical, 1 3/8" Diameter. Condition: New. Listed at 22.99 USD. 1 piano caster/wheel. Typically found on US made spinets and consoles in the back corners. New. Includes socket, bushing & shim (may or may not be required but midway through the job isn't the time to find out you needed them) and screws. 2 1/8" diameter mounting socket, mounts in approx 5/8" hole (probably what's there already). 1 3/8" diameter wheel, 1" wide. These casters are the same dimensions, specs (and same manufacturer) as our item #291677957965 caster set with the difference being these wheels are plain cast iron while the aforementioned set has plated wheels and looks better. This is a good set to consider if cosmetics are not a concern. (See 2nd pic, caster on left is plated, on right is plain steel wheel) I've been servicing pianos full time since I was 17 years old (35+ years) and in that time have serviced/replaced casters on hundreds of pianos - antique uprights, spinets, consoles, studios, square grands, baby grands and grands. I'm glad to answer questions about this product before or after the sale - my contact info is included in each shipment and you can also reach me through eBay.