Component location: Center of wheel
This product includes :
3x3.5mm Metal Countersink Washer 4pcs
Stainless steel Flat mind Screw 3x12 4pcs
Major top options that come with updating towards part/product:
1. The first wheel hub diameter is 3.5mm. You will learn area if install with unique 3mm screws. The item can fit better.
2. Initial installation must be to fix directly by screws, this method has upgraded to fixing by countersink washer and screws. This could efficiently provide wheel better.