Back 38 Next New Technology (M10, M12) Old Group # Model Numbers M1 2 MHB224-1 MHB424-1 MHB524-1 MHB525-1 MHB524-1NC MHB525-1NC M2 4 MHB228-3 MHB428-3 MHB528-3 MHB529-3 MHB528-3NC MHB529-3NC M5 3, 10 MHB230-1 MHB430-1 MHB530-1 MHB531-1 MHB530-1NC MHB531-1NC M5 5 MHB228-1 MHB428-1 MHB528-1 MHB529-1 MHB528-1NC MHB529-1NC M5 11 MHB228-2 MHB428-2 MHB528-2 MHB529-2 MHB528-2NC MHB529-2NC