Start with a short description of the part and its role in the finished product. Attach the current drawing or CAD file if you have it. If you are working from a sample, add photos from several angles with a scale and point out the features that matter.
Mark the requirements that affect the quote
Identify critical fit dimensions, the material or finish you want reviewed and any visible surfaces with appearance requirements. Include the artwork and placement for a logo when available. Mark open decisions so the supplier knows where you welcome options.
Include the quantities and timing
Give the expected sample quantity, first order quantity and target date if known. If you request pricing for several quantities, list each one. Note whether you need individual packaging, an inspection report or additional samples before releasing production.