This Seco tribrach has a focusing range of 1.5 to 50 ft (0.5 to 15 m). 

• Three screw-leveling with center line
• Comes without optical plummet
• 8-minute circular vial
• 5/8 x 11 base thread
• Color: Black
• Weighs 1.66 lb (0.75 kg)
• NOTE: These tribrachs do not fit Trimble "S" Series Instruments