Keysight Agilent E4991B-010 Test Head Probe Station Connection KitCondition: Used Excellent condition. Supplied as pictured, NO additional accessories, you will receive exactly what you see in the images. Accurate Impedance Measurement with Probe Station The E4991B with Option 010 probe station connection kit offers an accurate on wafer or micro component impedance measurement solution up to 3 GHz. With this kit, you can easily establish a reliable measurement system in a short amount of time. A small test head is