Sandleford brick insert letterboxes are manufactured to suit standard Australian brick sizes, ensuring simple installation. The Jet 316' is constructed from 316 marine grade stainless steel to provide maximum protection against rust and corrosion in the harsh outdoors. This is a perfect solution for homes near the ocean and other areas prone to rusting. It includes a fixed front, an opening rear that is key lockable and a telescopic sleeve. 
 
Marine Grade Stainless Steel construction
Key lockable (keys included)
Fits into 1 brick wide, 2 brick high cavity
Suits A4 mail and documents
Easily fitted to brick/rendered walls, fences and pillars
Includes Telescopic Sleeve
 

 
For specifications see images above.