ZSP (Zeta series) precision balance with a 150 gram capacity and 1 milligram readability. Includes a 4.5" (114mm) diameter weighing pan with push-of-a- button internal calibration. Patented, rugged design with cast aluminum housing improves stability, accuracy and durability. Includes 5 year warranty. It has user-friendly standard features for a wide variety of industrial and lab applications. Windscreen not included; circular and rectangular windscreens are available, and may be ordered separately.