-The smallest focus (0.8mm) in the tube-head makes the images clearer and reduces the X-ray dose by 16-20 times compared with any other products in domestic market. -The leaking radiation rate around 1m from focus is close to 0, and the head window is made of 1.5mm aluminum to filter X-ray. As a result, the health of patients and doctors can be protected better. *Note that extra delivery fees may be applied to this item. For more info contact Toothpick Customer Support or check out Terms and Conditions policy.