Stark Varg MX Rear Brake caliper bleeder + cover

The caliper bleed nipple with its dust cover, from the rear brake of the Stark Varg MX. The nipple is opened to purge air from the caliper when the rear system is bled or the fluid is changed, and the cover keeps grit out of the port between services. Rounded or seized nipples are a common casualty on a motocross bike, and both pieces are replaced together here.