Brake disk bolt kit contains 6 bolts fitting many models beginning middle 1980s and extending to early 2000s. These are 25mm long button head bolts that attach the brake disc to the wheel. These bolts are the same specifications as the original Guzzi bolts.
Guzzi parts books show this length bolt use on these models: LeMans III, California III, 1000S, Mille GT, Strada, 850T5, 1000SPII, 1100 Sport carbureted, Daytona/Daytona Racing, Jackal, California EV, Jackal, Bassa,and California Special 1998-2001
Note: Guzzi parts books are inconsistent and show both 20mm and 25mm bolts on some models. It's best to replace the bolts with the same length that you removed, so order accordingly.