材质
stainless steel,carbon steel,customized
用途
toy,sports equipment,door,baby carriage,etc.
Name
Metal Coil Tension Spring
Usage
Sports equipment,toy,door,baby carriage,etc.
Material
Carbon steel,stainless steel,inconel,etc.
Direction of turning
Multiple choice
Galvanize
Znic,nickel plating,colored-plating...