definition
A material made from wood chips or shavings, which are compressed and bonded with resin and formed into stiff sheets, and used in building or making furniture.
Tiles come in a range of different materials, from tin to polymer plastic, but the most common kind of ceiling tiles are made from fiberboard.
Cheaper pool tables are made with Slatron synthetic plastics layered onto particle board, and Permaslate, a honeycombed plastic set between two plastic sheets of plastic and medium density fiberboard (MDF) commonly used in construction.
Place a piece of plywood or medium density fiberboard (MDF) on top of the bed frame, making sure it's straight.
If all else fails, there are plenty of guides online that will help you to make a roller wheel yourself out of a ring of plastic or fiberboard.