To fix the clamp at the end of the hose and with a pair of pliers installation in a joint release can be easy to use and quick, durable and practical; clamps in the natural state, do not have the clamping force. Need to be set into the connector on the hose to produce the clamping force, is usually less than the diameter of the hose is 12MM diameter is, the use of the natural state is equal to or less than 11.5 of the clamp, the sleeve can be clamped. The texture and hardness of the concrete.