Features:
Works with for FAST helmet rails.
Use it to mount lights to the helmet.
Can quickly attaches or releases from the rail system.


Specifications:
Color:As picture
Quantity:1PC
Outer diameter: 30mm
Inner diameter: 25mm
Material: ABS
Package Include:1PC Helmet Clamp Adaptor

Note:
1.Please allow 0.1-0.3cm differences due to manual measurement, thanks.
2.Please understand because of the light irradiation or computer display difference, so I can't guarantee photos and real color is 100% the same.