Sundance Spa Nut, For SunScents Dispenser Assembly; 2 Inch Through Wall Filter Suction Assembly For Solo Models Only (2001+); 2 Inch Through Wall Filter Suction Assembly,For All Sundance Models (2001-Previous) Except Solo; 2 Inch Through Wall Filter Suction Assembly For All Models Except Marin (2002+). Measures 3-7/8" x 3-7/8" x 1"

SUNDANCE Part # SUN6540-791