In some applications the extra height of the adapter makes the installation very tight. Direct Fit Hose Ends help shave valuable inches in tight applications. Fragola Performance Systems Series 2000 Pro Flow Hose Ends feature the "single nipple" method of hose attachment. With the "single nipple" style, the socket draws over the hose between the inside of the socket and outside of the nipple. Making installation and reusing the hose ends a breeze.