Genuine HP 417441-001 M-SBF96 Silver and Black Three Button PS/2 Optical Scroll Wheel Mouse Compatible Part Numbers: 417441-001, M-SBF96 Genuine HP 417441-001 M-SBF96 Silver and Black Three Button PS/2 Optical Scroll Wheel Mouse Silver and Black design, PS/2 interface 3-buttons/ Scroll wheel acts as third button / Ergonomically designed Optical design for smooth, accurate tracking on most flat surfaces Compatible Part Numbers: 417441-001, M-SBF96