Description: Features: brand new and high quality Made of environmentally friendly mateiral, lightweight and delicate, more convenient to use. Humanized design: the place of replacement for head is protruding, do not leak light. Can be freely placed at 45 degree/90 degree/180 degree and other angles to meet the different needs. Reasonable structure, easy to use, not easy to for touch the eyes. Maddox is an important and indispensable tool for testing binocular visual function. Maddox can be used for horizontal and vertical recessive strabismus; rotating recessive strabismus. It has an important reference value in the evaluation of binocular for vision function and in the elimination of anomalies in binocular for vision. Specification: Material: ABS Handle length: app. 15cm(5.90in) Optional handle color: Black, Matte Optional ring color: Black, Matte, Wine Red Quantity: 1 set Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3cm 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 Handle 1 x Lock Ring 1 set x Different Functional Maddox Plates (other accessories demo in the picture is not included.)