The R2-5-2RS is a highly resilient inch-series miniature deep groove ball bearing engineered to deliver reliable rotation in environments prone to dust and moisture. Featuring a standard 1/8" inner diameter, this micro bearing is equipped with dual contact rubber seals (2RS) crafted from durable NBR (Nitrile Butadiene Rubber). Unlike standard metal shields, these contact seals create a physical barrier against external particle ingress and fluid splashes. This heavily shielded architecture effectively locks in premium factory grease while preventing abrasive contaminants from reaching the raceways, making the R2-5-2RS an essential component for demanding outdoor applications and exposed micro-mechanisms.