Size 178 mm, Internal focusing reading, 20 sec. accuracy with Vernier conforming to I.S. Specification Watt’s Pattern. Fitted with optical plummet, the Verniers & circles a graduated on embedded pure silver, High quality optics are fitted to give Erect Image with Steel Axis. Supplied with all standard accessories in F.R.P box with Export aluminum telescopic stand, packed in water proof canvas cover.