AquaStar Pool Products 705 15" Dark Gray Pool Wall Step (3 per set) The Pool Wall Step, model # 7xx, is a high-quality and functional addition to any pool area. It is manufactured from engineered polymer that is UV-resistant, ensuring that it will withstand the elements and retain its strength over time. Additionally, it is NSF-rated/ABS/ASA, meaning that it has been thoroughly tested and meets stringent standards for quality and safety.