Package Include: You will receive 2 sets door letter box flap equipped with the screws required for installation. The simple and advanced design can improve the overall style of the door Premium Material: Letter box for door has aluminium flaps to provide strength and durability combined. The more rust- and tarnish-resistant aluminium alloy is easy to wipe clean Product Dimensions: The letterbox cover with 293mm length 77mm height and 275mm screw spacing suitable for doors 4-8cm thick. Before ordering, please measure the size of the door hole to ensure a perfect fit Easy to install: letterbox draught excluder is equipped with all necessary screws. You only need to install the letterbox on the door and tighten the screws to complete the installation Widely Application: This letterbox draught excluder features a sleek and sophisticated design and is compatible with most wooden rigid PVC and composite doors ranging from 4-8cm thick, Manufacturer: Rthynti