Large Outdoor Lockable Letter Post Box Mailbox Wall Mount Secure Parcel Drop Box October 31, 2023 by admin Wall mounted or free standing. Lockable with 2 keys and install screw included. Style #04 Grey Letter Box w/Newspaper Holder: 37(L)x10(W)x37(H)cm. Style #02 Top Drop Tall Parcel Box: 40(L)x30(W)x90(H)cm.