PRODUCT : LETRASET TRIA MARKER – 24 PEN SET – INTERIOR DESIGN DESCRIPTION : Hand picked by design industry professionals, Letraset Tria Markers Interiors 24 Pen Set gives you the optimum colours for a variety of creative disciplines. This set comes with a stylish wallet for easy carrying and storage.A selection of colours for visualising interior design schemes. Letraset Tria Markers Interiors 24 Pen Set is the perfect choice whether you`re colouring plans and elevations, rendering a detailed interior scheme or visualising grand architectural concepts.