2 sticks with a diameter of 22 mm and a length of 50 mm are needed. you can make them longer or shorter as you wish.
To be more resistant with more rollers, I added a wire, but a string is also good.
The model called 7 pcs contains only one piece. For a spool holder that will have 7 rollers, 7 pieces are needed.
The author marked this model as their own original creation.