The Balmoral Plant Hanger enables you to handsomely showcase your favorite plant; the ultimate finishing touch. Balmoral Mailbox Post Plant Hook. The Balmoral Post Plant Hook lets you add the natural beauty of a hanging plant to your curbside Balmoral mailbox. Made of Aluminum, this plant hook won’t rust and resists weather damage with a powder coat finish. Dimensions: 0.5″ L x 13.3″ W x 9.5″ H Weight: 0.9 lbs