While changing the brake fluid for the first time I came across the two different size bleeders on the calipers. Using a Mity Vac and the right angle adapter worked good on the larger bleeder but the smaller one would not seal. I went to NAPA and got a hose that fit tight around the nipple but it still leaked air. Thinking it was coming around the threads I closed the bleeder and bubbles still came through. Apparently the hose doesn't have good enough grip to keep the air out but I need something flexible to get to the top right caliper bleeder. What do you use on the smaller bleeders?