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 adding 1/2" all the way around. 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.