Fume cupboard Clean Air Limited Discovery High-Containment Fume Cupboard. 1800mm wide. Ducted Constant Air Volume system. Includes: Toughened Glass Sash, Trespa Toplab Base Liners, Epoxy worktop, AFA 500 Alarm, Support Frame, 2 x double electrical sockets. PVC Spigot for connection to extract ductwork