Save installation time and maximize security with these adjustable columns. Provides height adjustment in 1" increments. Notched design for adjustment without disassembly. Includes set screw for add stability. Consists of 1. 5" NPT column, threaded on both ends. Use in combination with any Chief 1. 5" NPT ceiling plate or other accessory. Certifications: TUV Certified, UL Listed. Color: Black. Overall Dimensions (H x W x D): 18.0" x 2. 3" x 2. 3" (457 x 59 x 59 mm). Shipping Weight: 3. 00 lbs. Weight Capacity: 500 lbs (226. 8 kg).