Yamaha Upright Piano Insulator Black UNBK Genuine

These are insulators for Yamaha upright pianos. They were included as an accessory when a Yamaha piano was purchased.
They were not used and have been stored because a different insulator was used.
They were unopened, but have been opened for photography.
Due to shipping costs, they will be sent as a set of 2, not a set of 4.
Please understand that they have been stored at home.