This is a brand new aftermarket rear differential final driven gear CASE/HOUSING (NO INTERNAL PARTS INCLUDED---THIS IS JUST THE HOUSING) for the 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000 Honda TRX 300 Fourtrax FW 2x4 & 4x4 ATV Four-wheelers (this replaces Honda OE part #41300-HM5-A10, excluding all internal components and the side cover). If you need the internal parts, such as the bearings, seals, ring and pinion gears, brake drum, backing plate, etc, we offer those for sale in our store. We also offer the entire complete rear differential which includes the case and all the internal parts. This does include the vent tube pictured in the last photo.