BikeMaster 1 Litre Pneumatic Brake Fluid BleederQuick and clean. The BikeMaster 1 Litre Pneumatic Brake Fluid Bleeder is an air powered tool to cut down the bleeding the brake system. Dual bleeding lines are long enough to reach down the forks and around fenders to bleed two calipers at once. As easy as connecting to the air compressor, pushing the hoses onto the bleeder valves and then cracking open the valves. The Vacuum Bleeder will pull air and old fluid through as long as you hold the trigger.