It is a set of two of the so popular and much sought-after stands for my "BLOOM" resin technique. The stands can be adjusted a little bit by carefully bending them.
See pictures for dimensions.
Finding the suitable silicone moulds is very easy at amazon: https://www.amazon.de/gp/product/B07H1GVRSQ/ref=ppx_yo_dt_b_asin_title_o02_s01?ie=UTF8&psc=1