Send the core information together
Include the part material, finish, dimensions, quantity, mark content, location and required delivery date. Attach a dimensioned layout or describe the available marking area. If the parts are assembled or have handling restrictions, state that up front. A clear inquiry reduces the chance that a later detail changes the proposed process or price.
Identify requirements that add work
Sample approval, depth measurement, symbol verification, serialization records and special packaging should be listed explicitly. State whether a drawing or customer specification controls the method. Do not assume that every quotation includes the same documentation. Ask the supplier to identify exclusions and any information still needed before accepting the order.
Distinguish a forecast from a release
Provide the quantity for the current job separately from estimated future volume. If repeat orders are likely, ask how setup and repeat pricing are handled. A forecast can help planning but should not be presented as a firm commitment unless it is one. Confirm scope, price, schedule and shipping instructions before releasing parts for processing.