A part is one physical component of a template — a simple box is a single part, while a box with a lid is two. It shares its id, name and category with the corresponding nesting_template_component, so the same part is identified the same way across the platform. Each part carries a bounding_box (its flat outside footprint) and, when requested, an area (its flat material area).

type string The object type. Always "part" .
id string Identifier of the part, slugified from its name — for example "inner-tray" . "default" for a simple, single-part dieline.
name string The name of the part — for example "Inner tray" , "Sleeve cover" . "default" for a simple dieline.
category string The material category of the part — for example "carton" , "corrugated_cardboard" , "hard_cardboard" , "cover" .
bounding_box object The flat outside footprint of one copy of the part — the rectangle it occupies when laid out. The exact measurement it takes to nest and print it.
unit string The unit of width and height "mm" or "in" . Matches the unit you requested.
width number The flat outside width, rounded to two decimals.
height number The flat outside height, rounded to two decimals.
area object The flat material area of the part — the true area of its cut shape inside the bounding rectangle, not width × height. Only included when area is set to true in the request.
value number The material area, in the unit below.
unit string The unit of value "mm2" (square millimeters) or "in2" (square inches), matching the unit you requested.