Includes Grommet plate, Bolt, Wing nut, T wrench, and Cable ties Compatible: With LX Dual Direct Arm and LX Desk Mount Arm (short pole): 45-241-026, 45-489-026, 45-489-216, 45-489-231 and 45-490-216 Attaches: Through surface holes.31' to 2' (8 to 50 mm) wide and up to 3' (76 mm) thick Shipping Dimension: 9' x 8' x 0.5' (23 x 20 x 1.3 cm) Shipping Weight: 0.5 lb (0.2 kg)