1.characteristics: good Leakproofness High burst pressure fine Re-processing Prominent anti-vibration fatigue High inner cleanliness Precise geometry 2.Main use: widely used in evaporators, automobiles and heaters. 3. Materials: can be altered according to customers requirements 4. Size : 4.76mm×0.77mm, 6mm×0.7mm, 6.35mm×0.7mm, 8mm×0.7mm, can also according to customersrequirements.