Mailboxes 4375SLV Salsbury Mail Package Drop - SilverMailboxes 4375SLV Mail package drops are U. S. P. S. Approved master postal lock not required Manufactured by Salsbury Industries to USPS STD 7B Specifications Ideal for homes, colleges, schools, apartments, condominiums, office buildings, corporate mail centers, military bases and many other applications Made entirely of aluminum Feature a durable powder coated finish available in black, bronze, silver and white Includes an adjustable red signal flag