Typically, the outer rings on balancers don't slip without some reason, usually after years of oil saturation and deterioration and cracking of the rubber. The balancer you show in the photo looks to be in good shape as far as the rubber is concerned, that would make me think it is some sort of quality control issue or manufacturing defect that caused the ring to slip, so I would select another brand different from the one shown, just to make sure you didn't get another potentially bad one. Im not that familiar with the OEM style replacement ones enough to recommend a brand. You might try to google Dorman or ATP and see if there are any blogs or forums discussing them as far as problems, that might give you some guidance as to choosing one over the other.
