Protective grille for fans in accordance with DIN EN ISO 13857. Can be installed on the suction and pressure side. SGM: Made of impact-resistant plastic, pearl white, similar to RAL 1013, for ERM duct fans. SGM ... Ex: Made of metal for ERM-Ex fans for use in potentially explosive areas. Article: SGM 25 Ex, Air direction: Ventilation, Material: Metal, Weight: 0.2 kg, Weight with packaging: 0.24 kg, Suitable for nominal width: 250 mm, Width: 257 mm, Height: 257 mm, Depth: 25 mm