Extended length: 1800 mm. Diameter of the spring: 65 mm. Width of material: 12 mm. Material thickness: 1.2 mmInternal mounting type: Hook; External mounting type: HookThis is the chrome-plated spring that brings the feather back upward after completing the drilling.Used for all kinds of vacuum cleaner coil spring, volume tube coil spring, safe coil spring, etc.Chemical blackening, oxide film performance in the form of product, isolate the air, prevent rustExtended length: 1800 mm. Diameter of the spring: 65 mm. Width of material: 12 mm. Material thickness: 1.2 mmInternal mounting type: Hook; External mounting type: HookThis is the chrome-plated spring that brings the feather back upward after completing the drilling.Used for all kinds of vacuum cleaner coil spring, volume tube coil spring, safe coil spring, etc.Chemical blackening, oxide film performance in the form of product, isolate the air, prevent rustExtended length: 1800 mm. Diameter of the spring: 65 mm. Width of material: 12 mm. Material thickness: 1.2 mmInternal mounting type: Hook; External mounting type: HookThis is the chrome-plated spring that brings the feather back upward after completing the drilling.Used for all kinds of vacuum cleaner coil spring, volume tube coil spring, safe coil spring, etc.Chemical blackening, oxide film performance in the form of product, isolate the air, prevent rust