The Model 126 Plus ear measuring instrument is used to make axial measurements of deep-draw cups and can blanks. The typical standards here are DIN EN 1669 and ISO 11531. The device consists of a rotary table, a jaw chuck and a vertical measuring head (with measuring roller and length measuring probe). A jaw chuck secures and centers the cup. The measuring head can be adjusted to fit different sample diameters and heights. During one revolution of the rotary table, the measuring head records the shape of the cup edge (the so-called unevenness).