Product Features:
This is a high quality, lightweight, compact, base mount tubular radar reflector.
Aluminum sheets folded at about 90 degree angles and stacked up in the plastic tube provides a larger reflective area which help increase the Radar Cross Section value.
Specifications: 
Length: 12" (302 mm)
Diameter: 2" (50 mm)
Weight: 6 oz (194 gr)