Description: Made of high-quality Plastic, 4 cups in 1 package. These Caster Cups are lined with felt on the bottom Protect wheel of piano from rusting. Protect floor from scratch causing by piano. Specification: Material: Plastic Color: Black Quantity: 4 Bottom diameter: 10.3 cm / 4.05 inch Groove diameter :4.9 cm / 1.92 inch Package Includes: 4 x Piano Caster Cup Note: Size for manual measurement, there may be a 0 to 1 cm error, belongs to the normal phenomenon. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, Thank you!
