Features: Efficient noise reduction: Using a noise reduction rings can reduce the volume of the drum, making the practice quieter and maintaining a good playing feeling. Durable: Made of durable PET material, ensuring stability and durability during long-term use. Easy to install: The simple and easy-to-use design makes installation and disassembly very convenient, without the need for additional tools. Multiple options: The set includes multiple different types of circles, which can be selected and combined according to needs to meet different music styles and performances needs. Suitable for enthusiasts who enjoy playing drums, reducing noise and resonance, and enjoyings a more comfortable practice and playing experience. Specifications: Material: PET Style: White A/White B/White C Size: As shown in the picture Package Includes: 4pcs/set Drum Muffler Dampening Rings note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.