Length: 360 mm. Width: 47.50 mm. 2 fixed screw sockets M5 with bore hole distance 240 mm. Additionally 2 loose screw sockets M5 for screwing into predrilled holes. Many different bore holes distances are possible due to a multiple punching, (e.g., 84 mm, 100 mm, 134 mm, 136 mm, 200 mm, 240 mm, 254 mm, 268 mm.) Further bore holes distances are possible by predrilling individually. Each arm rest is packed individually in plastic bags including 2 pieces of loose screw sockets M5.