Piano Slow Soft Fall Device Aluminum Alloy Hydraulic Pressure Fallboard Decelerator Keyboard Cover Descend Retarder1DURABLE MATERIAL: Piano slow soft fall device can be used thousands of times, which is made of excellent aluminum alloy, polished, durable and ultra thin, universal for pianos 2HYDRAULIC DROP: Piano keyboard cover descend control device has hydraulic resistance, cushioning the fall of the piano cover, making the fall of the piano cover more reasonable 3COMPACT AND PORTABLE: The piano fallboard decelerator is lightweight and compact, easier to store and carry. With stable performance and long service life 4EFFECTIVE PROTECTION: Piano retarder prevent the keyboard cover from falling suddenly and injuring your fingers accidentally, and protect the external frame of the piano 5APPLICABLE CROWD: Piano keyboard cover descend control device is designed for piano, suitable for musicians, piano, piano lovers and so on