Simple stand with holes to poke through coloured acrylic rods 
The rods are not included, we are using our own for the photos 
The holes are 25.5mm and are designed to fit 25mm rods
They are not a tight fit, but close enough so the rods don't wobble and slip out high acrylic cylinder transparent colored cube - Temu United Kingdom
 
(Please note if the link doesn't work, they may have sold out, but just search for 25mm diameter rods (mine are 50mm long) 
If you already have a collection of rods, we can change the hole sizes for you, so just pop a note on your order 
There are 35 holes in the board and we’re happy to make it as a Flisat insert if you comment this on this listing or in the basket page