No more crawling under desks on your hands and knees! LUMI’s LDT20-C036UP Tripod Monitors Aluminum Slim Pole Held Mechanical Spring Monitor Arm comes with Top Fix fitting, which means this type of arm is perfect for limited space underside of the desktop. Providing 2 easily accessible 3.0 USB ports for charging and quality needed, its optimizing elbow spring gauge offers the performance and quality needed for weight adjustment. Quick-release VESA plate of exquisite structure and detachable joints make it an ideal support for longer life and easy installation. SPECIFICATION Product Category_ Mechanical Spring Monitor Arm Rank_ Premium Material_ Aluminum,Plastic,Steel Surface Finish_ Powder Coating Color_ Matte Black Dimensions_ 1416x176x649mm (55.7"x6.9"x25.6") Fit Screen Size_ 17"-27" Fit Curved Monitor_ Yes Screen Quantity_ 3 Weight Capacity (per screen): 0~7kg (0lbs~15.4lbs) VESA Compatible_ 75x75,100x100 Tilt Range_ +90°~-90° Swivel Range_ +90°~-90° Screen Rotation_ +90°~-90° Arm Full Extension_ 689mm (27.1") Pole Height_ 562mm (22.1") Installation_ Grommet,Clamp Suggested Desktop Thickness_ Clamp：10~50mm Grommet：10~50mm (Clamp：0.39"~2" Grommet：0.39"~2") Quick Release VESA Plate_ Yes USB Port_ 2xUSB 3.0 Port Cable Management_ Yes Accessory Kit Package_ Normal/Ziplock Polybag,Compartment Polybag Instruction Manual Included_ Yes