This bar utilizes the maximum available diagonal distance (350 mm) on P1/X1/A1 bed to make a backdrop stand, that you can just force fit onto Amazon basics or Neewer light stand.
The design fits well the Amazon basics stands, with 5/8" machined grooved bits. To take into account your material's retraction and the dimension of your pole's end, I suggest you make a test print with only the pressfit part to ensure the dimensions are good.
The vinyle backdrop you see on the photos is 55 cm / 21 inch wide.
I hope you'll enjoy your cheap and easy to set photo backdrop, with readilly availlable stand :)
The author marked this model as their own original creation.