Something hoop is relatively small, the value is also very small, but the hoop function is huge. American throat, also known as hoop. American style: stainless steel hoop is divided into small region and region, respectively 8, 10 bandwidth clamps, 12mm. The through hole technology, the hose clamp applicable scope broad, torsion and compression, hose clamps torsion torque balance, firm locking, tight, adjustment range is more than 30mm of soft and hard tubes connected to the fastening parts and assembly after the appearance. Features: worm friction is small, suitable for high grade high grade models or anti-corrosion material parts connection.