Replacement catridge   

    Replacement catridge for spa filtering
    Replacement catridge for spa filtering 13 5/16 x 5 x 2 1/8".

    Replacement catridge for spa filtering
    Replacement catridge for spa filtering 16 x 4 3/4 x 1.90".

    Replacement catridge for spa filtering
    Replacement catridge for spa filtering 6 x 8 1/4 (high speed tread).