This is a set of two replacement 10x15mm sealed ball bearings from Losi. These bearings support the axle in the rear hub carrier. 

• Losi 22 2.0
  Losi 22 3.0
  Losi 22 3.0 SPEC-Racer
  Losi 22 4.0
  Losi 22 4.0 SPEC-Racer
  Losi 22 5.0 AC
  Losi 22 5.0 DC
  Losi 22 5.0 Elite
  Losi 22 5.0 SR
  Losi 22-4 2.0
  Losi 22SCT
  Losi 22SCT 2.0
  Losi 22SCT 3.0
  Losi 22T
  Losi 22T 2.0
  Losi 22T 3.0
  Losi 22T 4.0
  Losi 22X-4
  Losi Comp Crawler
  Losi Speed-NT
  Losi XXX-NT AD2
  Losi XXX-T CR