Piano Descend Control Device, Dual Roller Self Adhesive Hydraulic Shock Absorber Keyboard Protector Accessories (Black) Assist Correct

FUNCTION: Prevents the keyboard cover suddenly dropping down, injuring your fingers and keyboard. EASY TO INSTALL: Choose the installation position and then stick it onto the place, easy to operate. HOW TO WORK: It adopts hydraulic controlling to lower the heavy cover slowly. POLISHED SURFACE: The with polishing treatment, smooth without burrs, can protect your piano from scratches. MATERIAL: Made of high quality metal, and usable for tens of thousands times.