Pinit POLYESTER (Mylar) Sleeve Insert MOVIE Poster. 36-1/4 x 14-3/4" 4 mil. NO flap. Open on one long edge. Indefinite Storage. SKU: S3614R (0)No Reviews yet Add to Shopping Cart Details Polyester (Mylar) Sleeve for Insert Movie Posters. 36-1/4 x 14-3/4". 4 mil. NO flap. Open on one long edge. Details Back DetailsPolyester (Mylar) Sleeve for Insert Movie Posters. 36-1/4 x 14-3/4". 4 mil. NO flap.Open on one long edge. Reviews 0 Back Ratings & ReviewsNo reviews availableBe the first to Write a Review