The Sokkia 12-Foot Pro Series Aluminum Prism Pole 808201 offers surveying professionals alternating red and white markings with dual graduations in hundredths of a foot and centimeters. At the bottom of the pole is an adjustable, stainless steel tip and at the top is 5/8 x 11-inch mounting thread. This prism pole's two aluminum sections are wear-resistant, extend to 12 feet, and collapse to 5.37 feet. Its soft, rubber knob locks easily loosen to adjust your length and lock to secure your desired length. Attached to this 1.25-inch diameter prism pole, you will also find a 40-minute level vial.