♥ Perfect Satisfaction , please contact me if you have any questions.Thank You! ♥ Inner conductive sandwich, to prevent leakage caused by physical injury, machine damage and other possibilities, increase the safety factor. ♥ Bearing pressure, pulse superior , combined tube tightly. ♥ The tube is light weight, easy to carry; small fluid resistance, the expansion is small, does not affect the pressure. ♥ Softness good, good flexibility, under high pressure can still be easily pulling, not curled.