100% brand new and high quality Features: The probe of the extra large magnetic field (type iii) is mainly used for the rectification of the emi's conduction. Use of a fully protected structure greatly suppresses electromagnetic interference from clutter in the external environment and improves the dynamic range of the entire system. It is beneficial to improve the position detection accuracy. The wrist portion is also protected, reducing the impact of the hand on the probe. Increased thickness for greater hand comfort. Specifications: Material: Metal + Plastic Optional Styles: A(Type II), B(Type III) From large to small diameter: app. 55, 25, 16, 10, 10mm (2.17, 0.98, 0.63, 0.39, 0.39in) Height: app.100mm/3.94in Color: As pictures shown Quantity: 1set Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1set x Magnetic Field Probe (other accessories demo in the picture is not included.)