The things that are easy to leave out and expensive to leave out.
Routine lead time and urgent lead time, stated separately. Minimum order quantity and any rental charge on vessels. Who owns the vessels, and who holds responsibility for their periodic examination, because that one has a habit of falling between two parties.
What happens across a bank holiday weekend, since that is when levels run down unattended and when a missed delivery does the most damage. And an escalation route with a name attached rather than a general enquiries line.
Finally, the price basis. Liquid nitrogen has no list price in the way a consumable does. It depends on the supply arrangement, delivery frequency and prevailing supply conditions, so a quotation that will not state what it is based on cannot be compared with another one.
