All Metal Slow Rocking Iron Wheel

Product information:

Size: 30
Speed ratio: 6:3:1
Number of bearings: 8+1
Weight: 274g
Braking force: 15kg
The amount of thread winding before shaking: 75cm
Winding amount:: PE3.0/210m, PE2.0/310m

Packing list:
Iron wheel*1