Linzer RC 101 1800 Nap White Woven Roller Cover, 18" x 3/8" The white woven cover is dripless and shed resistant For all paints 2-Ply polypropylene core adds durability and strength The nap is 3/8-Inch and the length is 18-Inch Linzer products corporation has been providing excellence in the painting industry since 1892. Through it all, we have grown to be one of the world's largest manufacturers, importers and exporters of paint tools and accessories