Top shelf, for securing to add-on rails, for bench width 900 mm. Supplied = assembled. Height = 40 mm. Width = 900 mm. Depth = 300 mm. For width = 900 mm. Type of mounting = on add-on rails. Material = sheet steel. Extremely easy height adjustment without tools. Top shelf made of sheet steel with mounting holes on the rear for adapting the rear panel board, incl. adapter for fastening to rails.