new product jinming 8 generation m4 upper spin ATK nylon adjustable upper rotor pure one-body technology outer sleeve inner tube QI14

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US dollar price:21.66
Dimensions after product packaging about:12cm * 8cm* 3cm
Gross weight of product packaging: 0.100Kilogram

Inner diameter is 7.5 mm
outer diameter is 16 mm
Suitable for Jinming 8 XM3l6
Black cattle casing etc Refit Metal outer tube use
Aerodynamics design
Increase the range of 5 light
Improve stability
The air hole is facing down when installing
Giving  Regulation tool