Extension module for device installation box, front-locking, can be extended as required, for on-site extension of existing device installation boxes GDM 50-1 VW, GDM 50-2 VW and GDM 50-3 VW by one or more built-in devices, the fastening takes place as a unit in the existing boxes, front-locking in the cover receiving contour of device duct bases, for accommodating built-in devices with 80 mm cover frame, halogen-free. For additional requirements. Use for: Device installation boxes GDM 50... Dimensions (approx. dimensions) Height H: 80 mm Width W: 71 mm Depth D: 50 mm for lid opening: 78 mm Color: traffic white RAL: 9016 (similar) Material: PA (polyamide), flame-retardant, self-extinguishing