Cartridge diameter -6" Cartridge length - - 5-1/2" Top configuration -Bar Handle, Bottom configuration -Male Pipe Thread (MPT) Bottom dimension -1-1/2" Square footage -25

Cartridge diameter -4-1/2" Cartridge length - - 9-3/4" Top configuration -Open, Bottom configuration -Open Top dimension -, Bottom dimension - Square footage -15

Cartridge diameter -4-3/4" Cartridge length - - 6-1/2" Top configuration -Open-Keyed, Bottom configuration -Open-Keyed Top dimension -, Bottom dimension - Square footage -25

Cartridge diameter -5-3/16" Cartridge length - - 11-7/8" Top configuration -Open, Bottom configuration -Open Top dimension -1-5/8", Bottom dimension -1-5/8" Square footage -25

Cartridge diameter -5" Cartridge length - - 9-13/16" Top configuration -Closed, Bottom: 2-1/8" Open Square footage -25

Cartridge diameter -2-3/4" Cartridge length - - 4-15/16" Top configuration -Open, Bottom configuration -Open Top dimension -1-1/16", Bottom dimension -1-1/16" Square footage -3

Cartridge diameter -4-5/8" Cartridge length - - 9-3/4" Top configuration -Handle, Bottom configuration -Open Top dimension -, Bottom dimension - Square footage -25 Spa OEM's that use this filter cartridge- After Hours Spas, Nemco Spas

Cartridge diameter -6" Cartridge length - - 4-5/8" Top configuration -Handle, Bottom configuration -MPT Bottom dimension -1-1/2" Square footage -22

Cartridge diameter - 4-5/8" Cartridge length - 11-7/8" Top configuration - Open, Bottom configuration - Open Top dimension - 2-1/16", bottom dimension - 2-1/16" Square footage - 25

Cartridge diameter -4-3/4" Cartridge length - - 18" Top configuration -Open, Bottom configuration -Open Top dimension -1-1/8", Bottom dimension -2-3/8" Square footage -16