Pemko Door Bottom Sweep, Clear Anodized Aluminum with 0.375" Gray Nylon Brush insert, 0.25"W x 2.25" H x 48" L All clear anodized brush products are supplied with gray brush (available with black brush upon request). Other finishes supplied with black brush. All brush seals greatly reduce the infiltration of light, air, wind, rain, and snow; prevent heat loss; control the penetration of smoke and fumes. UV stabilized, dependable, long-lasting, cost-effective. Nylon brush insert is designated by a undefinedNBundefined following the finish code. Punched with slotted holes for adjustment