CGSignLab |'Oh Snap' Perforated Window Decal | 30'x20'. Buy CGSignLab |"Oh Snap" Perforated Window Decal | 30"x20": Bumper Stickers, Decals & Magnets - ✓ FREE DELIVERY possible on eligible purchases. Easy to install . 80/20 perforation . Includes installation squeegee . Long lasting fade-resistant UV inks . Printed in the USA with full color edge-to-edge printing . Make a dazzling first impression with Perforated Window Decals. Perforated decals offer one-way visibility for businesses using micro puncture technology that provides shade and privacy for those indoors and an opaque design for incoming patrons. Apply Perforated Window Decals to any glass surface at your business to stand out among the crowd and increase your presence in the area! Perforated Window Decals are made of an adhesive vinyl material that has tiny perforations to give an opaque look on one side and a transparent view through the other. . . .