By using the MREEGS fence receiver accessory kit, you can ensure that your receiver collar maintains optimal performance. RFA-529 Pet Fence Replacement Kit includes 2 short stainless steel contact points, 2 long stainless steel contact points, 2 angular washers, 2 flat washers, 2 transparent protective covers, and 4 stainless steel receiver screws. Among them, the contact points are made of 304 stainless steel, the protective cover is made of food grade plastic material, and the screws are made of galvanized high-strength carbon steel; This set ensures effective signal transmission for different dogs, protects correction level buttons, secures receivers to prevent detachment, and can also repair old parts to reduce replacement costs. Overall, it is safe, durable, and suitable for outdoor use. In addition, it is also compatible with most PetSafe underground and wireless fences (excluding specific models such as Stay&Play).