Incorporating 6 flue diameters from 125mm – 300mm, along with a complete range of fixings and accessories, Professional XQ™ can be configured to suit virtually any installation requirement. The fully sealed chimney system offers not only water tight protection for the insulation within, but also protection during handling from cuts and abrasions that can be caused by normally sharp flue edges. The Professional XQ™ range with Twist-Lock connection, allows for quicker, easier and safer installation, with more versatility than other leading brands..