These replacement O-Rings are for the OPE Steiner MPS battery cap. It is sold in a set (outer o-ring and inner o-ring). The outer o-ring ensures a water resistant seal and the inner o-ring helps secure the spare battery inside the cap.
These replacement O-Rings are for the OPE Steiner MPS battery cap. It is sold in a set (outer o-ring and inner o-ring). The outer o-ring ensures a water resistant seal and the inner o-ring helps secure the spare battery inside the cap.
