More jack rabbits than people there too! Them southern boys oughta stick to haulin' vats of bacon grease n' pre-boiled grits.
If you mean the series of holes across the top of the sides, then I don't have the 'produce vents'. Although none of the watermelon shippers blinked at my vents when they inspected my trailer.
new one on me--never heard of a size--and judging from the major reefer manufacturers there is a major difference in size between them--just look at the standard size of a vent on a Utility vs those on a Dane
I put vents in my great Dane which had pigeon holes, from a utility dry van because I kept getting asked if I had produce or pigeon hole vents.
When I hauled spuds they made me cut out the 4 holes into one big one and leave the galvanized vents off until i was unloaded.