Features: Metronome sliding block is made of metal material, which is wear resistance and practical for the time-use. The metronome pendulum can move up and down, and the scale corresponding to the position of the pendulum indicates the number of per minute corresponding to the pendulum. The replacement piano metronome sliding block is easy to install and requires no additional tools. Changing the position of the pendulum block can change its vibration-period, all a good pendulum block is very important. Simple and convenient installation without any screws, just need a minutes to install. Suitable for most metronomes. Specifications: Material: Metal Color:Chrome Package Includes: 2 Pieces Metronome Slider note: Please allow 1-2cm errors due to manual measurement. Due to the difference betweeen different monitors,the picture may not reflect the actual color of the item.