Femoral trialling kit and assembly

A femoral trialling kit for assessing acetabular cup orientation during a left hip joint surgical procedure and a right hip joint surgical procedure, comprising:

• a trial femoral head having an inner wall defining a cavity extending along a head axis and a visual alignment guide on an outer surface of the trial femoral head;
• and
• a trial femoral neck having a taper at a free end, the taper being receivable within the cavity, wherein one of the taper and the inner wall has a first anti-rotation feature and a second anti-rotation feature, the first anti-rotation feature and the second anti-rotation feature being inclined, and the other of the taper and the inner wall has a third anti-rotation feature, and wherein the trial femoral head is attachable to the trial femoral neck in a first angular configuration corresponding to a right hip joint, in which the third anti-rotation feature and the first anti-rotation feature engage, and a second angular configuration corresponding to a left hip joint, wherein the third anti-rotation feature and the second anti-rotation feature engage, and wherein the trial femoral neck includes a first neck indicium and a second neck indicium on opposed sides of the trial femoral neck and the trial femoral head includes a first head indicium and a second head indicium on the outer surface of the trial femoral head and wherein the first head indicium and the second head indicium are respectively positioned about the head axis so that when the trial femoral head is attached to the trial femoral neck in the first angular configuration the second head indicium is aligned with the second neck indicium and when the trial femoral head is attached to the trial femoral neck in the second angular configuration the first head indicium is aligned with the first neck indicium.