Looking for the next big asymmetrical in your bag? Look no further than the Roto Grip UFO. The UFO has replaced the original HALO (Solid - Asym) in the HP4 lineup. Discernible differences between the UFO and HALO saw more defined mid-lane motion and shape with the UFO. The UFO still provides that heavy roll as seen with the HALO although with the increased mid-lane potential there is more opening up of the lane with the UFO. The UFO features the new E.T. Core with built in cavity to mimic the benefits of a weight hole. With an RG of 2.52, a differential of 0.054 and a PSA of 0.016 this ball will have no shortage of creating motion in the mid-lane and continuation down lane. Also, the UFO features a new cover (MicroTrax-S20) which is an expansion of the famous MicroTrax technology. This cover will increase traction even in the heaviest of oils. This ball will be a must have for those medium to heavier oil patterns whether there sport or house conditions. Make sure you visit your local Roto Grip All-Star Pro Shop and Drill One Up Today!