Cen Tec Systems Cen Tec Systems Central Vacuum Attachment Kit Utility Sink 375 Electronic Mechanical Electronic Interior Exterior Interior Exterior 375 Electronic Mechanical Electronic Interior Exterior Interior Exterior Material Zinc Number of Batteries Required 4 Maximum user codes 50 Included Hardware (1) 2631 20 M18 brushless 7 1 4 in and 5” upholstery tool with a built in brush strip ideal for stairs and the sofa The second nozzle is a premium 12” USA produced hard floor brush with natural horsehair fill ideal for delicate floor surfaces Compatible with all major brands of central vacuum systems equipped with industry standard pin jack inlet valves