Global Truss Speaker Mount for F31-45 , Speaker mount for F31-F45 trusses, Mounting spigot diameter: 35 mm, For mounting on tubes: 48 - 51 mm, Max. load capacity: 70 kg, Dimensions (Lx W x H): 400 x 300 x 115 mm, Weight: 2.15 kg, Includes 5032-2 coupler