Rear brake master cylinder cover gasket 

Ref. H-D : 42455-99

As per photos

Brand : Harley-Davidson

Type : New

Fits on :

The part is compatible with the following motorcycles :

CVO
Road King : FLHRSEI (2002), FLHRSEI2 (2003).
Electra Glide : FLHTCSE (2004), FLHTCSE2 (2005).
Fat Boy : FLSTFSE (2005).
Road Glide : FLTRSEI2 (2001).
Softail Deuce : FXSTDSE (2003).

Touring
Road King Police Escort : FLHPEI (2002-2005).
Road King Police : FLHPI (2002-2005).
Road King : FLHR (1999-2005), FLHRI (2000-2005).
Road King Classic : FLHRCI (1999-2005).
Road King Custom : FLHRS (2004-2005), FLHRSI (2004-2005).
Electra Glide Standard : FLHT (1999-2005), FLHTI (2003-2005).
Electra Glide Classic : FLHTC (1999-2005), FLHTCI (1999-2005).
Ultra Classic : FLHTCU (1999-2005), FLHTCUI (1999-2005).
Electra Glide Police : FLHTPI (2002-2005).
Road Glide : FLTR (1999-2003), FLTRI (1999-2005).

Softail
Heritage Softail Classic : FLSTC (2000-2005), FLSTCI (2001-2005), FLSTCI Shrine (2005).
Fat Boy : FLSTF (2000-2005), FLSTFI (2001-2005), FLSTFI Shrine (2005), FLSTFI-ANN (2005).
Softail Deluxe : FLSTN (2005), FLSTNI (2005).
Heritage Springer : FLSTS (2000-2003), FLSTSI (2001-2003).
Springer Classic : FLSTSC (2005), FLSTSCI (2005).
Softail Standard : FXST (2000-2005), FXSTI (2001-2005).
Night Train : FXSTB (2000-2005), FXSTBI (2001-2005).
Softail Deuce : FXSTD (2000-2005), FXSTDI (2001-2005).
Springer Softail : FXSTS (2000-2005), FXSTSI (2001-2005).