Refa Fine Bubble U - New, Unopened Technology that maximizes the saturation of two types of bubbles: "Double Spiral Cavitation" This unique structure uses pressurized dissolution and two-stage cavitation to simultaneously generate ultra-fine bubbles and microbubbles in water. Because it utilizes dissolved air in the water, it can generate fine bubbles even when the showerhead is submerged in the bathtub. ⭐︎ Product Size (mm): Approximately 241 x 96 x 134 ⭐︎ Included Accessories: K (for KVK) adapter, M (for MYM) adapter, exterior ring, rubber packing (thin), opener, instruction manual (this book), quick guide, guarantee card, warranty Model Number: RS-BH-02A ⭐︎ Retail Price: 30,000 yen ⭐︎ No returns accepted.