Separate identity from acceptance
A grade name identifies a class of material. The purchase specification records the required limits and tests. Request the current document before treating a catalogue entry as a binding offer.
Keep the version
Attach the agreed specification to the commercial discussion. If a parameter changes, record the revision and ask for confirmation instead of relying on an earlier message.
Connect it to the cargo
The offered specification and a batch analysis serve different purposes. Ask for the batch reference and check it against the shipment documents.