A big arm is joining the Mets’ bullpen mix for this season and another is returning from the injured list, but what is lacking in overall high-end stuff might be compensated for, at least partially, by the unit’s diversity.

Newly acquired Shintaro Fujinami brings 100-mph heat — the same neighborhood in which Edwin Diaz resides — to the equation.

But the Mets’ bullpen will largely be defined by different looks.

“In a perfect world, you certainly want everybody throwing 100 mph with a knee-buckling breaking ball,” former Mets pitcher and current SNY analyst Ron Darling said. “The alternative to that is if you just picture a clock and you can cover all the numbers on the clock and then you have a good bullpen, and I think that’s what the Mets have.