Sundance Spas SunPurity Mineral Spa Sanitizer Type_Water Seat Packing 219 pleats into a

Packing 219 pleats into a compact 9-1/4 inch cartridge gives it real capacity for its size

BioGuard Balance Pak 100 is used to raise total alkalinity

Width (Outside edge to outside edge): 38 inches

This pillow does have a groove at the bottom

Materials: Stainless steel

Sundance Spas SunPurity Mineral Spa Sanitizer Type_Water Seat Packing 219 pleats into aSundance Spas SunPurity Mineral Spa Sanitizer Overview The SunPurity mineral spa sanitizer has been designed to work exclusively in Sundance Spas by utilizing water flow through the Sundance filter system. SunPurity mineral spa sanitizer treated water is brilliantly clear and soft. An alternative to chlorine when used in combination with MPS. Ends chlorine hassle when used in combination with MPS, and improves water quality. Lasts up to 4 months.