Dimensions: 5 3/4" x 8 1/2"

Part Number: 58

These filters are used in the following spas:

CL400

CL400E

CL500

CL550

CL800SE

CL1000

CL2000

Star

Aurora

Nebula

Lunar

Galaxy

Comet

Constellation

Mariner

Navigator

Voyager

Aviator

Explorer

Endeavor

Mardi Gras

Carnival

Regatta 

Freestyle 14

Medley

Sprint

Relay This swimspa requires 4 filters or 2 sets.

Marathon 18/3 - This swimspa takes 3 filters

Marathon 18/5 - This swimspa requires 4 filters or 2 sets.

Olympic 21/6 - This swimspa requires 4 filters or 2 sets.