As of January 1, 1999 the Kirby Morgan KMB 18B Band Mask, Part numbers 500-025, 500-026, will ship as standard with the DSI large tube SuperFlow 350regulator, Part number 505-069 (currently standard on the SL-27). This replaces the small tube regulator, Part number 505-027. The KMB 18A Band Mask will continue to ship standard with the small tube regulator.
The small tube fiberglass mask frame, Part number 520-055, will still be available as a replacement part. The KMB 28 Band Mask frame, Part number 520-096, will continue to support the small tube regulator.