RH-1502Z.. Zinc Plated Steel Trunk Corner Size is 2.5″ x 2.5″ x 2.5″. Six mounting holes, .196″ diameter holes. 14 Gauge Steel. A ball corner is designed to allow a square cut trunk corner fit without having to round off the edge of the wooden trunk corner. Also available in black powder coat, item RH-1502BK. Sold individually.