44     is threaded series 6

E44           B+W Circular Polarizer...cs...n/o...65.00

    44           Aetna close-up +1 chrome...u/m...8.00

    44           Aetna close-up +3 chrome...u/m...8.00

   44           Soligor 6-pie multi-image...u/m...12.00

    44           Vivitar close-up set/3...u/m...18.00

    44           Vivitar UV Haze...u/m...8.00

    44           Vivitar yellow 2 (8)...u/m...8.00

    44           Vivitar 21 Orange...n/o...12.00

    44           Vivitar light Green...n/o...12.00

    44           Vivitar X1 Green...u/m...8.00

    44           Vivitar metal lens shade black...n/o...7.00