This 20 x 37 x 17 mm (NA4904) bearing is a needle roller bearing. The NA4904 inner diameter is 20 mm, the NA4904 outer diameter is 37 mm, the NA4904 width is 17 mm.
Specs:
Inner Diameter (d): 20 mm Outer Diameter (D): 37 mm Width (B): 17 mm Bearing Model: NA4904 Material: GCR15 Bearing Steel
