M&T Displays Interchangeable Anti-Reflex Clear Overlay Lens PET Protective Cover for Business Office Home Slide-in Snap Poster Frames 3 pcs in a Box 24x36 Inches These PET covers are the perfect solution to protect your poster from the daily effects of sun and light. This clear overlay is the perfect solution for your Snap Frame, Slide-In Frame, Poster Frames, and more. This reusable cover is economically friendly as well as the prime solution for your display needs. It is made of the finest materials while providing the highest level of quality. Anti-glare covers to protect your poster from getting dust and damage yet prevent glaring for a better and clear view. These Covers are designed to be used with snap frame products that fit with 24x36 Inch posters. It can be used in other application that needs anti-glare or dust protection and it can be used on vertical or horizontal (portrait or landscape) position. Feel free to ask any questions about the product and installation. We are always here to help.