JET, 300, ROTO, SS, 5-SPOKE 109108 Vita Spa Jet: This is known as a Vita Spa by Maax 5 spoke ROTO (swirls) jet (5 gray spots) that was used in 2015-2016 Spa Models. It measures about 3 1/4" across the front. Why choose US? Over 20 years...