... intensity:It only accounts for 25% of metal tubes.The compression resistance is higher than 5Mpa(50kg/cm2),It also features shockproof ... .High flexility,anti-cold and anti-expanding.6.Good heat resistance:low heat conduction,anti-heat water,high voltage proof.Under ... pollution for its thermoplastic material ,glossy inwall & outwall ,smaller flow resistance and low noise.8.It is the most durable tube ...