https://www.jwfg.com/products/17-60-mesh-black-pollen-screen.html 17*60 Mesh Black Color Pollen Guard Window Screen The Pollen Screen, made from durable polyester, features a 17*60 mesh design and is available in grey and black colors. Designed to reduce the exposure to airborne allergens, JINWU pollen screen for patio creates a barrier for most pollen and dirt particles, while allowing clean air to flow through the interior environment.All Rights Reserved