Vvhome 2 in 1 Heavy Duty Nylon Braided Collar & Pet Leash Pet Chain Rope for Medium Large Training Dogs MATERIALS AND SIZE: Nylon and High quality metal chainLeash about 120cm/47".Adjustable neck circumference 40-50cm/15.7"-19.7". EASY TO USE : It's very easy to take on and off through the automatic adjustable chain.Rope wide 2cm,Collar wide about 3cm.Very suitable your hand and pet neck. COMFORTABLE FOR PET: Made With Your Dog's Comfort In Mind Dog collar self adjusts as pressure is applied to leash, won't choke your pooch or damage fur. STRONG AND DURABLE: Unbeatable Strength Dog leash & collar with 8x braided nylon threads meet search & rescue standards.No More Twist 360 rotatable connection for easy movement on walks & in dog obedience training class. QUALITY ASSURANCE: All products are thoroughly inspected and tested from WA, United States.if you have any question,please contact with us.