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Compatibility: Compatible with various small motors, gearboxes, winches, RC models, garden equipment, and light to medium-sized machinery for unidirectional transmission. Function: Used to achieve unidirectional rotary transmission, prevent reverse rotation, and improve equipment operational stability and transmission efficiency. Dimensions: Bearing model HF1216, inner diameter 12mm, outer diameter 18mm, width 16mm, standard and universal dimensions. Material and Structure: Made of bearing steel with a needle roller structure design, wear-resistant, pressure-resistant, and with strong load-bearing capacity. Applications: Widely used in power tools, automated equipment, transmission systems, mechanical equipment, and industrial transmission fields.