Product information:
Specification: 28 simplified
Shape: Set ruler
Net weight: 0.1
Packing specification: 15.7*21.7
material: plastic
Color: 28-piece set / free tutorial, new upgrade special-shaped 18-piece set / free tutorial
Length: Wanhua Ruler

Packing list:

Wheel gear*15
Long rack *1
A4 paper *1 pack (around 15 sheets)
Heterogeneous wheel gear*4
Fixed adhesive*1
Pattern guide book*1
Ring gear*4
Pen*4

OR

10 shaped gears
2 ring gears
1 piece of glue
3 pens
1 pack of A4 paper
1 pattern guide book