Gibraltar Mailboxes Gentry Large Capacity Double-Walled Plastic White, All-In-One Mailbox & Post Combo Kit, GGC1W0000 Large capacity fits larger boxes, padded envelopes, and magazines laid flat Double-Wall plastic construction is rust-proof and virtually indestructible Ultra-Violet inhibitor white finish prevents color from fading in the sun Box/Post combo installs easily over the Gibraltar 4x4 Easy-Install Anchor Post Kit - APK00000 Made in the USA