ONE OF A KIND C-4 BACK WINDOW 4.5 LBS . I MADE A MOLD OFF THE GLASS AND TWO LAYERS OF 6 OZ. GLASS CLOTH AND A LAYER OF 1/4 INCH THICK URATHANE FOAM AN A LAYER OF 10 OZ. GLASS CLOTH , VINALESTER RESIAN VACUMED BAGGED. HAS 8 SLATS TO SEE OUT AND TWO ON EACH SIDE. I GOT THE IDEA FROM THE CAR IN THE I ROBOT MOVIE. I TESTED IT. NEEDS A BRACE GLASSED IN IT AND PRIMED AND THIN PLASTIC I HAVE FOR THE SLATS TO BE CUT AND GLUED IN. YOU SHOULD HAVE SEEN ALL THE WORK TO MAKE IT.250.$ FINISED . IN TAMPA CRAIG C.