"DIETRICH INDUSTRIES" BULLNOSE CORNER CAPStyle: Plastic 2-Way Corner Cap Size: 3/4" Easy to install. Rust proof and dent resistant. Eliminates costly mitering of corners. Can be applied to windows, closets, doorways, skylights, etc. 3/4" corner cap provides the component to transition bullnose corner beads to a crisp finish where inside corners intersect at 90-degrees.