Heavy Duty Materials: The Support Clamp is made of Strong Aluminum Alloy, secure compact construction design with Corrosion-resistant and Rust-proof, Steady and Durable for long last. Dimension: Clamp: (1.65*1.3*2.36)inch / (42*33*60)mm, 2.7oz/75g; Freestanding Base: (7.87*1.97*0.24)inch / (200*50*6)mm - 6.1oz/172g (Steady and strong Aluminum Panel with non-slip sticky mats on bottom). What You Received: Set of 2 Pack Desktop Support Clamp: 2Pcs clamp + 2Pcs Freestanding Base + 2Pcs 20mm and 2Pcs 25mm screws + 1Pcs screwdriver + 4Pcs clamp mat + 4Pcs fixed screws. 20mm and 25mm Screws make clamp for (0.079" to 0.59") / (2mm-15mm) thick Acrylic Panels, Plexiglass Shield. Simple Looking & Easy To Apply: These Support clamp have been Bead Blasted Finish, awesome looking without color fading worries. Easy to apply, come with a screwdrive for convenient Install. Lifetime Warranty: Aims for you satisfaction. Any questions & problems, please feel free to contact us for solutions. Sincerely Service for you.