Spectra Precision GR151 Grade Rod The Spectra Precision GR151 Grade Rod is a rugged telescopic aluminum grade rod designed for precise elevation measurements in construction, surveying, and laser leveling applications. Featuring a durable 5-section design, the GR151 extends to 15 ft and includes tenths graduations for accurate field readings in imperial measurement workflows. It is also a direct replacement rod for Spectra Precision System Kits . Key Features • Extends to 15 ft with telescopic 5-section design • Tenths graduations for precise elevation readings • Durable rugged aluminum construction for jobsite use • Replacement rod for Spectra Precision System Kits