DIY Electic Skateboard Kit Parts For 80MM Wheels
Motor mount for 5065/5055 motor X1 (18MM hole)
Pulley for 80MM wheel X 1
Pulley for motor X 1 (for 8mm shaft)
15MM belt X1
Screw to fix the gear on the wheel X 5
Screw to fix the gear on the motor X 4
Here is the Assembly guide(←click here) for your reference.