The Walkezee Package consists of a Walkezee Harness & a Coupling Attachment. The Coupling Attachment will give you control from the top of the dog not the side and create an even contact across the dogs chest. We advise the use of a coupling for small and young dogs but it can be used on any dog to create the top contact. IF YOU REQUIRE A DIFFERENT LENGTH COUPLER THAN STATED PLEASE EMAIL YOUR REQUEST WE WILL BE HAPPY TO OBLIGE.