Replacement 3/4-inch collar straps for SportDOG Brand training e-collars are perfect for replacing old collar straps or differentiating each dog's collar by assigning them colors. Simply remove the receiver unit from your dog's current collar and place it on the new strap. The SportDOG Brand team and our families enjoy many of the same hunting opportunities and outdoor activities that you do.That's why we recognize the importance of wise conservation and habitat-enhancement initiatives. We support conservation efforts by contributing time and funding to projects that ensure hunters will have wild places to hunt wild game for generations to come.