1. Material: metal
2. Technology: nickel-plated
3. Shock absorbing spring design, effectively reduce the damage to the dog neck when running
4. Elastic material, not easy to rust
5. Easy to install, convenient to use with leash
6. Installation method: first use 2 U-shaped hooks to connect the items to be connected, and then squeeze the U-shaped hooks into the spring
7. Weight: about 70g
Note: delivery only spring, does not include other items in the picture