ALL WEATHER DURABILITY - Made with UV16 resin, Aqua Chairs and Outdoor products are built to withstand sun, rain, wind and every other seasonal environment for years. ADJUSTABLE CHAISE RISER - Aqua Outdoors Chaise Risers add height and style to your in-pool chaise lounger. Designed for ledges with water depths of 9 to 14 inches, our chaise risers have two built-in slot supports - longer on the outside for 9” to 12” and shorter on the inside for 12” to 14” depths. SAFE FOR ALL POOLS - Whether your pool is saltwater or chlorine, vinyl or fiberglass, commercial or residential, our risers offer superior protection from chemical corrosion and discoloration. MADE IN THE USA - From concept to creation. Our offices are located in Texas. Our team of experts are happy to assist you if you have questions or concerns. Add a chaise riser to our in-pool chaise lounge chair for ledges with water depths of 9 inches and up to 14 inches. We do not recommend using a riser for depths greater than 14 inches. The riser has two slots built in the side supports. The longer (outside) slots are for water depths of 9″ to 12″. The shorter (inside) slots are for water depths of 12″ to 14″. You can use any slot you would like for depths under 12″ depending on how much water you would like to sit in. The deeper depths need to use the shorter slots in order for the chaise loungers to stay secure to the surface.