Bolt Motorcycle Hardware (DPWM6.11-10) M6 x 11mm Drain Plug Washer, (Pack of 10) Pack of 10; M6 aluminum drain plug sealing washers Soft tempered copper compresses to seal in fluids Most OEM's recommend replacing sealing washers at each oil or coolant change Dimensions ID: 6mm; OD: 11mm Meets or exceeds OEM specifications