DescriptionCommodity Quality Certification : ceModel : E1 E2 E3Country/Region of Manufacture : ChinaThis product may be intended for use by a health care professional use only. The seller may ask you to evidence you are a qualified health care professional entitled to buy and use such products in your country.E1:(120 angle holder) for shank dia:0.57mm0.57mm K files,for anterior canal cleaning, sterilizing and taking out the stem in canal..E2:(95 angle holder) for shank dia:0.57mm0.57mm K files,for anterior canal cleaning, sterilizing and taking out the stem in canalE3:After canal cleaning, using the mechanism and heat engery of ultrasonic vibration to intenerate the filling lateral condenstation, to make sure the top of the scaler tip touch the lateral condensation.