If you're a medical professional or a student, here's your chance to score a free Mantoux Tuberculin Skin Testing Ruler! This handy tool helps you measure the size of the induration or swelling on the skin, an essential step in Tuberculosis testing. 

 The Mantoux Tuberculin Skin Testing Ruler is a specialized tool used in Mantoux Tuberculosis testing. This ruler helps medical professionals accurately measure the size of the skin induration or swelling after injecting the tuberculin solution into the skin.