Letterbox Slot Clearance Visual

Create one finished image using [letterbox measurements], [parcel dimensions] and [viewing notes]. Depict a cutaway with slot, flap and interior depth separately marked, using supplied geometry. Distinguish exterior slot size from internal usable space and flap clearance. Do not claim a parcel fits from the front opening alone or infer delivery guarantees. Use deliberate composition, legible visual hierarchy and no invented factual labels.

Use the attached references only for the specified visual attributes. If a required reference is missing, request it before generation. Produce one finished image with a deliberate focal point, consistent geometry and clean margins. Keep any exact wording on a separate editable label layer or leave its area blank. Do not invent evidence or present an illustration as documentary proof.