Cal Spa Filter 1 1/2 Inch Fem SAE FIL50-5D13H15FCT-3 Blue

 DISCONTINUED version, see the newer model 40508U or  FIL50-5D13H15FCT-7 .

Cal Spa Filter 1 1/2 Inch Fem SAE FIL50-5D13H15FCT-3as used in Cal Spas and other brand hot tubs.  The filter may be blue or white, depending on what Cal Spas is currently providing.

50sqft spa filter cartridge - 1-1/2"female SAE bottom threads, 5" diameter, 13-1/16" long.

Then see FIL50-5D13H15FCT-7 

Top handle may be s-shaped

3oz Point Bonded is a uniformly bonded media. Reduced pore size distribution offers quick cleaning and superior dirt holding capacity with lower pressure and higher flow.

Filter Cartridge 50 Sq Ft. 5" ODX 13" H x 1.5" ID, Female Coarse Thread

Or see the factory replacement filter FIL50-5D13H15FCT-4.