Large Mus.Stand Plate With Arm - Plate diam. 47.8 x 34.5 cm / 18.8" x 13.6" - Clamp mechanism w/ lockscrew to attach to a stand - Clamp diam. 14 - 35 mm / 0.5 - 1.75 in. - Total Weight (plate & arm): 1.9 Kg / 4.18 lbs