Crown Corner Blocks from AMS are composed from North American hardwoods. The line includes inside/outside corners, as well as continuation pieces designed to enhance interior trim and save installation time. They are made to accept crown moulding with installed sizes ranging from 2 5/8 in. to 7 ½ in. high. Cherry, hard maple and red oak are standard; other species can be ordered. (800) 411-5146, Castlewood.com.