Choke Dog Collar of Black Stainless Steeel, Herm Sprenger
[HS15#1057 51641 (57) Collare a catena di Herm Sprenger]

I was looking for a collar 4mm. This is a good product, small rings, protects from torning hairs. Black collar looks very cool on a black Labrador! The diameter of the rings at the edges is larger than I thought, so maybe I could have taken a larger size.