1. Product Overview The MR104 Micro Miniature Deep Groove Ball Bearing features compact size with thickened width, high-hardness chrome steel brings low-noise, steady precision rotation, fit miniature devices with limited installation space. Get a quote within 24 hours for your project 2. Technical Specifications Model MR104 Inner Diameter (ID) 4 mm Outer Diameter (OD) 10 mm Width 4 mm Structure Single row miniature deep groove ball bearing Material Chrome steel Gear Type (if