Carbon fiber telescoping poles are graduated to read direct for a 135 mm prism height. Adapters will achieve other prism heights. Features include a stainless steel pin which locks the inner pole. Holes are spaced every 0.5 ft. These poles include the popular TLV lock which has a 40-minute vial built-in. Inner poles have dual graduations in centimeters and 0.01 ft. External 10ths graduations. Collapse to 4.97 ft (1.52 m) and extend to 8.53 ft (2.60 m).