The 6704-2RS is an ultra-compact, single row ball bearing engineered specifically for constrained spaces where protection against environmental contaminants is an absolute priority. Distinguished by its dual rubber contact seals (2RS), this thin-wall model creates a highly effective barrier against moisture, dust, and abrasive particles while securely retaining its internal lubrication. With its precise 20mm bore, 27mm outer diameter, and slim 4mm profile, the 6704-2RS delivers exceptionally reliable performance for outdoor robotics, fluid-handling devices, and specialized optical gear.