VIVO Counterbalance Height Adjustable Gas Spring Fully Articulating TV Wall Mount for LCD LED Plasma Screen 40" to 55" (MOUNT-VW03G) COUNTERBALANCE GAS SPRING adjusts to your TVs weight for easy screen placement. TV must weigh at least 17 lbs for counterbalance to work COMPATIBLE with flat screens 40" to 55" in size, weighing between 17 lbs and 66 lbs FULL ARTICULATION with +10 to -15 degree screen tilt, +90 to -90 degree swivel, and a 12.5 range of height adjustment for the best viewing angles FITS VESA 75x75mm, 100x100mm, 200x100mm, 200x200mm, 300x300mm, 400x200mm, and 400x400mm 3 YEAR MANUFACTURER WARRANTY - This product comes with a limited 3-year Manufacturer warranty as well as friendly tech support to help with any questions or concerns