[Premium Material]Wall Mount Post Box Suggestion Case is made with aluminum alloy frame,lightweight and durable [Size Information]Donation suggestion key drop box measures approx 21cmx9.5cmx28cm/8.27inch x 3.74inch x 11.02inch [Lockable]Wall Hanging Suggestion Case Organizer equipped with a security lock and two keys,which provides a secure place for your mails [Multipurpose]Multifunctional box can be used for donation,collection,key drop, checkout,comments suggestions box,time card box ballot box [Application]Suggestion Case Mailbox with Lock can hold various envelopes,paperwork,newspapers,etc.,suitable for home,official bureau,or company