The 3.3" Stainless Steel Roto HK12 Jet Insert in Black is an advanced jet insert designed to elevate the hydrotherapy experience in Marquis hot tubs and spas. Constructed from durable stainless steel with a sleek black finish, this jet insert combines strength and functionality. Its rotational design delivers a dynamic, rotating water flow, offering targeted muscle relief and enhancing the therapeutic benefits of your spa. Compatible with various Marquis hot tubs and spas, this jet insert can easily replace existing jet inserts to restore or upgrade your spa's performance.