The compass consists of a metal housing and a metal/plastic lid with a glass window with the sighting line etched into it.

Our prismatic compass consists of:

1.Thumb ring
2.North line with north arrow 
3.Bubble level
4.Compass rose with 360 degree scale
5.Rotary dial with 360 degree scale
6.Inch scale
7.Base table
8.Housing
9.Lens prism,vertically adjustable
10.Sapphire bearing
11.cm scale
12.Stand thread
13.Sighting window with sighting line
14.Lind

Get the ultimate direction finder in digital camouflage print
Compass face diameter: 2-1/8" (marked in 5-degree increments)
1/4-inch sighting lens & sighting lines on cover
Entire compass measures 3-1/4 x 2-1/2 (inches)
Come with instruction, water-resistant nylon pouch & lanyard