This 17 x 30 x 13 mm (NA4903) bearing is a needle roller bearing. The NA4903 inner diameter is 17 mm, the NA4903 outer diameter is 30 mm, the NA4903 width is 13 mm.
Specs:
Inner Diameter (d): 17 mm Outer Diameter (D): 30 mm Width (B): 13 mm Bearing Model: NA4903 Material: GCR15 Bearing Steel
