Designed for round and square spas with reversible treads. Black, spongy, rubber that provides a safe non-slip surface that soft to the feet. Drawers that provide storage, creating the perfect storage step. Exclusive Features o The Strongest step in the industry. o The widest step with a 36inch tread. o Easy assembly, four pieces that press together for the perfect fit. o Maintenance-free, no sanding or re-staining.