Start with the right material list.
A fabrication job rarely needs just one profile. Gate frames may combine hollow sections, flats and solid bars; brackets and racks often need angles and plate together. Send one consolidated cutting or material list so dimensions and units remain clear across the whole enquiry.
Plan before you order
Separate finished cut sizes from the stock lengths you want to purchase. Include any visible-surface or finish requirement before comparing prices. If an existing job must match, give the measured outside dimensions and thickness rather than only its informal market name.