There is not an instruction
I didn't got any instructions...
Not very good quality. The product is not exactly the same than on photos, it semms cheaper in reality... No manual to assemble the product (yes, because the customer has to assemble it !). And one of the screw that is used to adjust the height is defective. Impossible to screw it. I will have to make a new one with my 3D printer. Not very satisfied ! So much time lost.