MACRS Life of a Trash Container/Dumpster

Any input on the MACRS life of a garbage dumpster? Have a construction client who purchased a trailer and two dumpster units. Figured the trailer is either 5 or 7 year property but can't find anything on the dumpsters.

Thanks!

I'd go with:

trailer

Asset class 00.27, Trailers and Trailer-Mounted Containers, 5yr GDS

dumpster units

Asset class 15.0, Assets used in construction activities, 5yr GDS

Find Rev Proc 87-56 and bookmark it for future reference.