The Seco 8.5-Foot TLV Prism Pole 5500-11 has alternating red and white markings for surveying jobs with dual graduations in hundredths of a foot and centimeters. And at the bottom of the pole is an adjustable tip. This prism pole's one aluminum section is wear-resistant and extends to 8.53 feet or collapses to 4.97 feet. Its soft, rubber knob easily loosens to adjust your length and locks your desired length. Attached to this 1.25-inch diameter prism pole you will also find a level vial with 40-minute sensitivity.