This Peerless 12’’-18’’ (0.30-0.45 m) Extension Column is specifically designed for height adjustment in 1’’ (25 mm) increments. It can provide support up to 900 lbs. The high-grade quality solid steel that is used for making this adjustable extension column ensures its long life and excellent performance under harsh conditions. It includes a 1.5’’ diameter standard NPT pipe, which provides interior cable management to ensure a clean look in a trade show, signage, retail, or home applications.