Features: 1.Preventing over charging battery and improve charging capability. 2.Designed with heat sink fins for better cooling, long service life. 3.Solid-state electronic component, help to dissipate excess voltage. 4.Original standard, perfectly match to the original motorcycle. 5.Compatible for Yamaha YZF-R1 1999-2001 R6 1998-2002. Specification: Features: Preventing over charging battery and improve charging capability. Designed with heat sink fins for better cooling, long service life. Solid-state electronic component, help to dissipate excess voltage. Original standard, perfectly match to the original motorcycle. Easy to install, just plug and play, no instructions required. Compatible for Yamaha YZF-R1 1999-2001 R6 1998-2002. Specification: Condition: New Material: Aluminum Alloy Color: Black Size: 88 * 90 * 27mm/3.5 * 3.5 * 1.1in Package Weight: approx.232g/8.2oz Fitment: for Yamaha YZF-R1 1999-2001 for Yamaha YZF-R6 1998-2002 for Yamaha YZF600 1996-2005 for Yamaha YZF600R 1995-2007 for Yamaha FZ6/FZ6N/FZ6S 2004-2009 for Yamaha FZR600 FZR600R 1995-1999 for Yamaha XP500 T-MAX500 2001-2007 for Yamaha TDM850 1996-2001 Package list: 1 * Motorcycle Regulator Rectifier PackageList: