Microfiber roller cover is ideal for interior applications providing a smooth finish. These covers work best with semi-gloss and high gloss finishes and will distribute paint evenly, creating an ultra smooth finish on the wall. May be used with latex or oil-based paint. Works with flat, eggshell, satin, semi-gloss, or gloss paint finishes. For smooth to semi-smooth surfaces. Made of premium microfiber with a polypropylene 1-1/2 In. core.