This is a new rear sprocket made by PBI Sprockets. It is for the following Suzuki motorcycles 2015-16 GSXS750---- 2001-08 GSXR1000----  2000-10 GSXR750---- 2003-07 SV1000 and 2008-19 GSXR1300 Hyabusa. PBI aluminum rear sprockets are made in the USA of aircraft quality plate aluminum. This has 44 teeth and is for a 520 chain. The PBI part number is 6046-44. Free shipping in the U.S.