PART #11913 '70-'81 Camaro/Firebird POLYCARBONATE Windshield, 1/8" Margard. Specify either stock cut or flush cut when ordering. Stock cut is when using factory trim and 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.