Abstract: A millable bridge plug system includes a mandrel, an upper cap end, a sealing member, ring members, cone assemblies, slip devices and a lower cap end. The sealing member, ring members, cone assemblies and slip devices are positioned on and around the mandrel. Ring members abut against an upper end and a lower end of the sealing member. The other sides of the ring members abut against the cone assemblies, and the cone assemblies engage respective slip devices. The upper cap end attaches to the first slip device, and the lower cap end attaches to the second slip device. The lower cap end holds the mandrel and second slip device together to resist rotation during milling.