This is for a NOS 76 77 78 79 80 Kawasaki KZ 750 Carburetor Main Jet #135.  This is just for 1 jet.  They come without any packaging.  It should fit the following models: 1976  KZ750-B1 1977  KZ750-B2 1978  KZ750-B3 1979  KZ750-B4 1980  KZ750-G1  LTD II