Radiant Pools 4075 Winter Cover Step Flap for Metric Pools - The Winter Cover Step Flap has been specially designed to cover walk-in steps on Radiant Metric pools. This new winter cover attachment locks into a Radiant winter cover utilizing an engineered bead receiver that is part of the step flap. The step flap can be used on winter covers for both 2" and 4" coping as well as the new universal coping on the Metric rectangle pool.