The phrase "a certain box" is correct and usable in written English.
It can be used when referring to a specific box that is not named or described in detail, often implying some significance or relevance to the context.
Example: "Inside a certain box, I found the old letters that I thought were lost forever."
Alternatives: "a specific box" or "one particular box".
He knew that the object of his desire, Marilee, had prepared a certain box.
Through our finding aids we provide basic information about a collection, enough so that a researcher can determine whether or not to request a certain box.
Once we stop trying so hard to fit a certain box, we can start exploring what our own desires actually are.
A woman and I can find each other attractive, but at the same time, she finds my favorite Internet video extremely unfunny, or feels she could never go out with anyone who checked a certain box regarding politics.
Around a campfire or a cafeteria table, tourists and weekend warriors could find in Chongo a certain box to cross off, the obligatory aging hippie recounting unintentionally hilarious misadventures, denouncing the prison-industrial complex and rhapsodizing on junk science.
But there is one thing in her well-ordered life that can turn her into a raging, irrational harpy, one thing that can burrow through her armoured suit of organisation: a certain box belonging to her boyfriend.
Given that this is a rare stage appearance for him, Lost Land is a certain box-office hit.
Hingis offers a certain box-office punch as a former top-ranked player, but there is an egalitarian spirit in World Team Tennis, or at least that is the hope.
Even though this year's belated sequels ― "Zoolander 2," "My Big Fat Greek Wedding 2," "Independence Day: Resurgence" ― have underperformed, Maguire said she feels no added pressure from Working Title and Universal Pictures to ensure "Bridget Jones's Baby" hits a certain box-office threshold.
A white, male, middle-class American writer can experiment with form and choose any subject he wants, but a woman writer from Algeria or Afghanistan should produce stories that fit into a certain cultural box.
The bureau's agents go out each month and look for a list of the same products -- a certain weight box of Tide, for example -- and record their prices.
