wire gauge: 4 mm link size: 1.85 x 1.25 in (4.7 x 3.2 cm) one link adds 1.6 in (4 cm) to a collar length
Antique brown steel: high rust resistance smart antique look contains nickel, so will not do for dogs with nickel-sensitive skin and light fur perfectly blends with dog's dark coat
wipe it down with a clean, damp cloth for more stubborn dirt, use a little water, some mild soap, and a soft-bristled toothbrush after cleaning, wipe it down with a clean, dry cloth use it sparingly not to damage its surface, otherwise it may lose its rustproof properties