The CP120B & CP160B generators can be equipped with either a filter or lead cap. These can be used to filter out low energy beams and in doing so improve the image quality.
For instance, the lead cap is used to block the X-Ray beam during the pre-heating of the CP160B.
Both the filter and lead cap are combined with a specific holder to fix the accessories on the CPB generators. Thanks to its easy fixation system, mounting and dismounting of the filter plate and lead cap is possible.