1.frame:

steel,painting,argon welding or co2 welding.

2.fork:

steel,argon welding or co2 welding.

3.rim:

steel or aluminum

4.brake:

F/R  caliper brake or R band  brake

5.tube:

air or EVA

6.free wheel:

16T /18T /20T

7.pedal:

plastic with reflector or without reflector

8.saddle:

leather,spring ,plastic or imitation leather

9.B.B parts:

B type.3pcs

10.hand bar:

Steel,CP

11:mudguard:

steel,painting or CP.

12.grip:

PVC/rubber foam

13.carriers:

steel,with or without tool box