are cardboard or 100% magnetic
models are available with an erasable pen and a choice of pen
holder. such as
item TMC-2 - Mag Boards, it is
made out of .020 inches. White plastic
clip and attachment included. Black
erasable pen included. and item
SIG01 Mag Memo Boards Memo Boards
allow messages to be written and wiped
off time and time again.
Magnetic strips on back hold board
and damp-erase pen firmly in place.