Made of high-quality chrome-plated alloy. Durable and unbreakable. Does not rust easily or change color. Chrome-plated O-ring double leash; hard-plated leash for attaching the leash. Length: 40 cm (small dog), 50 cm (medium dog), 60 cm (medium dog), 70 cm (large dog). This double leash coupling can walk with 2 dogs. The design allows easy control of 2 dogs.