All harnesses come complete with standard parts. To familiarize yourself with these parts see the larger view of each harness picture where you will see that each part has a corresponding item number. Replacement parts are available individually (see standard parts). There are also quite a few optional parts available to dress up/modify your harness selection. Please feel free to call 1-866-669-2064 or e-mail us with any questions you may have. Collars are not included in price.