Can be bent by hand as it cools in cold water or ice.
Flowering automatically when its surface temperature reached above 55℃.
Going around automatically when the wire heated by hot water.
Diamter:15-20mm, ring is sheathed on an aluminum alloy rods and connected automatically（without any welding）in hot water at 50-60 degrees Celsius, loosening and disconnecting after cooling.
Contract ( strenching and shorting) when be heated by hot water or dryer.
Custom-designed base on dimession, Af temperature, surface and application.