The MR104-2RS is a premium single-row miniature deep groove ball bearing designed for mechanical systems that demand strict spatial efficiency alongside rigorous environmental protection. Featuring a 4x10x4 mm dimensional profile and engineered with twin synthetic rubber contact seals (2RS), this component creates a highly effective barrier against moisture, particulate matter, and operational debris. Its robust yet compact design makes it highly suitable for 3D printer extruder assemblies, micro-stepping motors, and sensitive laboratory instrumentation, ensuring optimal grease retention and safeguarding internal raceways from premature wear.