A. 2Pcs TTC Yellow Core Encoder Decoder. B. It has a customized long lifespan of 48 million times. C. It offers relatively high precision and a slightly stronger scale feel. D. The encoder can be commonly used if the encoder of your mouse has the same height (distance from board surface to center hole). E. Compatible models: Mamba Tournament Edition, Mamba HyperFlux, Mamba Elite, Viper Wired, Mamba Wireless, Basilisk V2, Basilisk Ultimate, ROG Gladius III. F. Specifications: Core - Yellow; Life - 48 million; Quantity - 2PCS. G. Package Includes: 2Pcs x TTC Mouse Encoder. H. Note: Size is measured manually, and there may be an error of 0 to 2 cm, which is a normal phenomenon. Additionally, due to differences between different monitors, the picture may not reflect the actual color of the item. Thank you!