Measurements:
Depth = Measure from wall to front
" = Inches
House wall mount : (Lenght x Depth x Height ) 18" x 12" x 18"
Shelf wall mount : (Lenght x Depth) 12" x 10.5" 
Horizontal Pop-up scratcher : Pole size 4.25" x 4.25" , Lenght 11"
 
The whole set has the following items:
1 House wall mount
2 shelves
1 Horizontal scratching post
 
Installation:
We will provide all the scerws required. You will need help of a local carpenter to drill holes in your walls and install it.
 
Quality:
Premium Birch ply stained and polished to make it look like a fine wood grain. The quality is the best in the market.
 
Cleaning:
Use damp cloth to clean it. 
 
Location:
Covered balconies or indoors where your cats can watch birds.
 
Safety measures:
Make sure you use the screws that we provide
Make sure the wall mounts are not installed at a place where cats can touch the ceiling fan, or climb the POP, or climb TV or any such risky place
Do not keep too much distance in between the individual wall mounts, cats are great atheletes but always keep wall mounts close enough to avoid any risk