Phifer 3003519 48-Inch by 100-Feet Fiberglass Screen 20 by 20 Charcoal Product Description 48 inch x 100', black, fiberglass screen, known as No-See-Um screen, screen is a tightly woven 20x20 mesh, designed to keep out smaller flying insects, while densely woven, allows good ventilation visibility daytime privacy, woven from permanent glass yarn, coated with a protective vinyl to ensure lasting beauty, color flexibility, screen is not combustible will not rust, corrode or stain. This product adds a great value. Product is highly durable and very easy to use. This product is manufactured in United States. From the Manufacturer Phifer Fiberglass 20 by 20 "no-see-um" screen Charcoal 48-Inch by 100-Feet is made with tighter mesh to keep out most insects. Features This product adds a great value Product is highly durable and very easy to use This product is manufactured in United States USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.