1.Do not contain eight heavy metal elementsa and four halogen elements.Passed SGS test. 2.Donot contain organic stannum compound,Asbestos,Azo Compounds and Formaldehyde. 3.Operating Temperature：-55℃～125℃. 4.Shrinkable Temperature:Start at 70℃,and shrunk totally at 110℃(for thin wall);or 120℃(for normal wall),longitudinal shrink ratio:≤?%. 5.flexible,flame retardant. 6.The Available sizes form Φ0.6～Φ180mm,Can produce upon customer's special requirement. 7.Easy for use,using oven or heating gun and it will shrink.