These castor cups measure 60 mm diameter. They are suitable for pianos which use castors of different sizes at the front and the rear.
The pack includes:
2 universal castor cups for all single wheel castors.
2 cups with large 20 mm holes for castors measuring 35 - 50 mm in diameter, or wide twin wheel castors.
The castor grips the felt and spreads the weight of the piano. They are suitable for all hard floor surfaces.
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