Aluminum Corner Trim - Square - Set of Two 4ft LengthsPlease select the style and color that corresponds with the style and color of slatwall these trims will cover. Aluminum Corner Trim with square edges for covering outside corners of slatwall. In most cases, these trims should be painted to match the style and color of slatwall you have or will also purchase. These trims come in sets of two 4ft lengths.