Frame and infill cover manufactured from extruded aluminium. Clear opening at the bottom: connection for a PVC drainage pipe (Ø 250, 315, 400 mm). The cover is loose-laid in the frame. Galvanised steel plate (3 mm) as base plate (on request: 3 mm aluminium base plate). Two seals: one at the base and one in the side of the outer frame. The T-shaped rubber seal has a threefold function: it prevents dirt ingress between the infill cover and the frame, the resilient effect avoids stresses between the infill cover and the frame, and it provides additional odour sealing.