Andis blades are very well made from the best materials. The are long-lasting and fit a variety of models. These blades will not fail to meet your expectations. If they do, the will be resharpened free of charge by Andis Co (see back of packaging for full details). Features: Carburized steel. Chrome finish resists rusting. High quality UltraEdge blade. Fits all Andis AG, BG, & MBG, and Oster 76, 111, & A-5 models. Dimensions: Size - #0000 Hair Length - 1/100" or 0.3mm - All dimensions listed are approximations.