⊙ 889 Series - Regular housings in 5" and 10"
⊙ 891 Series - Enhanced housings in 10"
⊙ 890 Series - Enhanced housings in 20"
⊙ 908 Series - Big blue housings in 10" and 20"
⊙ Optoinal parts - Brass port, pressure release button...
⊙ Optoinal accessories - Bracket, wrench...