brand new and high quality. Features: Made of high quality plastic and electronic components, it is sturdy, solid, durable, anti-corrosion and good performance. This probe is mainly used for measuring the pH which is either the concentration of hydrogen ions in an aqueous solution or the activity of the hydrogen ions in an aqueous solution. High precision that it can gives almost instantaneous readings, accurate and reliable. It can indicate if the solution is acidic or basic, then you can regulate the concentration of the solution as you like. With a single cylinder, it can be used with PH meter, controller, or any PH device which has a BNC input terminal. Suitable for aquarium, hydroponics, laboratory, etc.. PH electrode probe only, other accessories demo in the picture is not included! Specification: Material: Plastic, Electronic Components Size: Approx. 16.5x1.5 for cm/6.49x0.59 inch Color: Random Delivery (If you buy more than one, colors you receive will be same or different.) Quantity: 1 Pc Note: No retail package. 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: 1 x PH Electrode Probe