... according to our client's requirements. We have sizes of inner tube for the shower head at present as following. ... %Ozone resistance(100ppm,40°C*100h), elongation 20%: No cracksTensile strength, Min.(psi): 9.6MpaElongation/repture, Min. %. 360%Hardness inrease, ... Max.duro.points: +3AChange in tensile strength, Max. %: 15%Change in elongation strength, Max. %: 20%Tear strength, Min.KN/m,(lbf/in): 17KN ...