The Purdy Pro-Extra White Dove Sleeve has a large core diameter and holds 25-35% more paint than standard sleeves for increased productivity. They are made from high density, woven Dralon, a derivative of nylon, which enables the paint to flow freely into and out of the cover for easy rolling and a high-quality finish. Use with all paints and exterior stains, especially where a smooth, lint-free finish is desired. Material woven Dralon fabric Size 228mm (9in) Nap Depth 10mm (3/8in) Core 44mm (1.3/4in)