28 sq. ft. Cartridge Filter Martec, Sonfarrel C-4301 FC-1610

• Diameter.......................................4-15/16"
• Length..........................................14-7/8"
• Top End Cap: id/config.................2-1/8" / open
• Bottom End Cap: id/config............2-1/8" / open

The cartridge is used on the following spas:

• Advantage Mfg.
  • OEM P/N ELE-25 (top load)
• Martec
  • OEM P/N CL-2200
• Nordic Hot Tubs
• Sonfarrel
  • OEM P/N 220122
• Thermo Spas of Connecticut