This new product from Herm Sprenger! Herm Sprenger donates proceeds from every item sold from the Sprenger BLueline Edition. This couple has an 8" adjustable side with slider, and a 4" non adjustable side attached to a central D-ring for your leash. This is great for attaching to a prong (4" side) and a regular collar (longer side) as well. One style/size.