ADAPTER; TYPE: AIR LINE; MATERIAL: RUBBER TUBE; ADDITIONAL FEATURES: WITH REAR MOUNT, INCLUDES SA-2500 BREATHING TUBE, GVP-127 BELT AND SA-1009 VALVE, VERSATILE, CAN BE USED WITH FACIAL PIECES, HALF FACE AND FULL FACE OF LINES 6000 7000,, BALANCED AIR SUPPLY BY STETHOSCOPE-TYPE BREATHING TUBE DESIGN,, AVAILABLE TWO FRONT ADJUSTMENT BREATHING TUBES (SA-1000) AND BACK ADJUSTMENT; SUGGESTED BRANDS: 3M SA-2000