New shock absorber system to change riding comfort
New: new suspension seat tube, using internal suspension
High quality: the outer tube material is made of high-strength aviation material.
Function: the screw under the seat tube can adjust the stroke rebound speed
A seat tube that is taller and more comfortable for riding 

Information:
Material: Aluminum alloy. High quality, durable, long lasting and easy to install
Color: black ， Red
Size: 27.2 * 350 , 31.6 * 350mm
Suspension system: internal coil with preload regulation
Process: matte anode, no film mark

Packing List: 
Mountain bike bicycle suspension seat tube *1