PART #11921 '70-'74 Camaro/Firebird POLYCARBONATE Rear Window, 1/8" Std. Specify either stock cut or flush cut when ordering. Stock cut is when using factory trim. Flush cut is oversized. Some minor trimming may be needed for proper fitment. POLYCARBONATE WINDOWS ARE CUT TO ORDER OUT OF FLAT SHEETS AND ARE NON-RETURNABLE. If you have any questions call 800-822-3392.