Coastal Pet Products DCP552016 16-Inch Titan Fine Chain Dog Training Choke/Collar with 2mm Link, Chrome Titan dog training choke/collar is excellent for gentle control This fine quality chain is argon welded and chrome plated for maximum strength and durability It will not tarnish, rust, or break and recommended for professional training Use only when dog is attended on leash and is sized by total length, including the rings Measures 16-inch overall length and 2.0-mm link diameter