Rib specs for food service (as opposed to retail codes) will normally be pretty tight on weight. If you are selling racks, you don't want one to be 2.5# and the next one to be 4#. I don't see this product code in the database, but I don't think they normally market Primes to the food service market, so it is probably a special Prime 3#and down product code.
Typically, 3# and down is about as heavy as you will find for food service, but you can ask if they have a heavier product code. Typically, the heavier, comp worthy, racks go to retail channels in mixed weight cases. Any grocery store selling Smithfield/Farmland could order these for you if they want to. You will get maybe 3-4 you can use for comps out of a case.