Adjustable Window Screens are ideal for use in your home RV cabin boat or mobile home. Featuring fiberglass screen with a durable aluminum frame it can expand from 20 inches to 37 inches wide to create ventilation in a variety of window sizes. ADFORS is leading the industry by offering a complete line of ortho-phthalate free screens. GREENGUARD Gold Certification that limits strict emissions during production and is designed for a healthy living space.