Set of 3 - Solid Brass, Nickel Plated Grand Piano wheels with

• Wheel Dia. 1-3/4" 
• Wheel Face Width 9/16" face.

Supplied with CS-1,  Steel Pressed Square Socket

• 1-5/8" Dia. base with 4 screw holes ( screws not included ) 
• 1-1/8" Center to Center Screw Spacing
• OD Of Stem 1/2"
• Stem Height 1-1/2" 

All of our wheels are sold with their own sockets. You will be required to replace the entire wheel / socket assembly to ensure a proper fit.
You may be required to modify the existing hole in your piano to accommodate the new casters.
Unfortunately there is no reference manual to tell us what wheels would work in each of the over 12,000 pianos manufactured.