The Perimeter Comfort Contacts 5/8" Rubber Tipped Medium Contact Points Probes are replacement collars designed for use with electronic fences. These contact points, infused with a metallic material, are compatible with most brands and feature a 5/8" length ideal for medium length haired dogs and cats. Made in the United States by the brand Perimeter, these probes provide a comfortable and secure fit for your furry companions during training and obedience sessions.