Features:brand new and high quality12mm height dimension.Customized high life 1 million times.Relatively high precision, slightly for stronger scale.The encoder can be commonly used as long as the encoder of your mouse have the same height with it.(Distance from board surface to center hole)for:Razer Deathadder Elite ,Deathadder 2000,DeathAdder Essential etc. Mouse,As long as the height is 12mm , it can be used universally!Specifications:Height dimension:12mmCore : YellowSize: approx. 2x1cm/0.79x0.39inNote:Size for manual measurement, there may be a 0 to 2 for cm error, belongs to the normal phenomenon.And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package includes:1 x TTC 12mm Mouse Encoder