The Nickylab Martingale Dog Collar & Leash Set in size Large and vibrant red color is designed for dogs with a nylon material construction. This set includes both a martingale collar and leash, providing pet owners with a complete and stylish accessory for their furry companions.  L fits neck sizes 16.t to 20in.The Nickylab brand is known for quality and durability, making this collar and leash set a practical and fashionable choice for pet owners looking for reliable gear.