This product is either discontinued or we cannot get that from suppliers.
BRATECK LDT20-C024UP Dual Monitor Aluminum Slim Pole Held Mechanical Spring Monitor Arm, Fit Most 17"-32" Monitors, Up to 8kg per screen, VESA 75/100mm, Easily tilt, Swivel and rotates, Cable Management, Powder Coated, Aluminum, Steel, Plastic, MATTE BLACK
The LDT20-C024UP Dual Monitors Aluminum Slim Pole-Mounted Spring-Assisted Monitor Arm comes with Top Fix fitting, which means this type of arm is perfect for limited space underside of the desktop.