Lion Roar 1:700 scale brass photo-etch set LE700044 is entitled IJN Triangular Perforate Board. You may wonder what that may be. Actually this fret is made up of a huge number of triangular shaped supports for platforms and superstructure. Although this set is listed as designed for Japanese warship models, it is eminently applicable to model ships of almost any navy. There are thirteen different sizes ranging from the very small 1mm x 0.5mm to the largest, which measures 7mm x 1.5mm. Each of these supports exhibits weight saving circular voids, which were a characteristic of very many support structures.