Or equal
"Or equal" in a specification means a bidder may offer a product other than the one named if it meets the same requirements.
The engineer decides whether a substitute is equal.
On a real bid
Some specifications ask for substitutes to be approved before bids are due; others let the contractor submit them after award. The rules are in the specification's general section.
For a manufacturer that is not named, "or equal" is the door into the bid.
Where Capveon reads it
Capveon reads each specification and says whether your product is named, allowed as an equal or left out, with the page.
