Saftron Figure 4 3 Bend In-Ground Spa Return-to-Deck Rail contains reinforced, encapsulated steel interior which provides superior strength and durability. A high impact polymer exterior ensures Saftron rails are unaffected by pool chemicals, salt and sun and remain cooler to the touch. High impact polymer railings are made of specially formulated compounds to ensure longevity and unparalleled resistance to the elements, UV and chemicals while requiring virtually no maintenance. They are guaranteed to keep their smooth, bright finish for many years. No grounding or bonding required