AquaStar Pool Products TS105 1.5" MPT Dark Gray Theraputic Spinner Jet This product features a stainless steel ball bearing race that creates a smooth and therapeutic spinner action, perfect for spas. The spinner can be easily screwed into any existing 1½" fitting, making it an ideal solution for pool builders and remodelers looking to upgrade their pool or spa. Made from UV-resistant engineered polymer and manufactured in the USA, this spinner is durable and built to last.