GoVets offers O-Rings and O-Ring Kits in the Hardware category to help customers complete their projects. Backup Rings are a type of product in this sub-category that are used to provide additional support and stability to O-Rings. They are designed to fit into the groove of an O-Ring and help to prevent the O-Ring from extruding into the gap between the two mating surfaces. Shop today to find the right Backup Rings for your project.