grid stencil 3d model

3D printable flat stencil template, 180mm wide x 170mm tall x 1.5mm thick, rigid flat plate with engraved grid pattern, 4 major columns and 6 major rows creating large cells, each large cell subdivided into 5x5 smaller squares with thin grooves 0.3mm deep, all grid lines are recessed channels not through-holes, smooth flat surface, no text, no labels, slight chamfered edges for safe handling, designed for use as a reusable writing guide overlay on a notebook, material suggestion PLA or PETG, minimal supports needed, STL format"