1. Material: aluminum alloy, hydraulic 2. Quiet double pulley design, uniform force, no damage to the piano 3. Hydraulic resistance device design, make the piano cover fall slowly when it is closed to prevent fingers from being hurt 4. Made of alloy material, strong and sturdy, waterproof and not easy to rust 5. Double-sided tape is attached, not easy to fall off, and does not hurt the piano 6. Dimensions: 9.5 x 2.8 x 7.7 cm 7. Weight: about 119 grams
