Features:  

--100% new and high quality.

--It is durable and convenient. 

--High frequency low loss easy installation. 

Specification: 

Type:Mouse Scroll Wheel Encoder

Size:9mm/11mm

Material:ABS

Color:black/red

Package Contents:2*Mouse Scroll Wheel Encoders

Note:

1.Please be reminded that due lighting effects, monitor's brightness/contrast settings etc, there could be some slight differences in the colour tone of the website's photo and the actual item. 

2. Item Measure by hand, it could be 1cm different,your kind understanding will be much appreciated.