Describir: Materials of construction :

  ______    _____     ______     ___     _    _    _    _     ______  
 /_____//  |  ___||  /_____//   / _ \\  | || | || | || | ||  /_   _// 
 `____ `   | ||__    `____ `   | / \ || | || | || | || | ||    | ||   
 /___//    | ||__    /___//    | \_/ || | \\_/ || | \\_/ ||   _| ||   
 `__ `     |_____||  `__ `      \___//   \____//   \____//   /__//    
 /_//      `-----`   /_//       `---`     `---`     `---`    `--`     
 `-`                 `-`                                              
   ___    
  / _ \\  
 / //\ \\ 
|  ___  ||
|_||  |_||
`-`   `-`