20 sheets of Crimp Wired Foundation, Steel Hook fits behind the wedge in wedge top bar frames. 9 vertical crimped steel wires radiate strength, perfectly milled cells deep exact walls. We recommend adding cross wires in deep frames Foundation is 8 1/2 inches x 16 3/4 inches fits 9 1/8 frames. Approximately 7 sheets per pound. Use wedge top bar only and grooved or slotted bottom bar.