This is a ball-bearing, dual-arm, heavy-duty boom stand for stereo microscopes. This boom stand weighs about 38 lbs. It is brand new in factory sealed box. Features & Specifications: A Versatile Boom Stand Covering Large Working Area Ball-Bearing Dual Arm Design for Easy Operation 22-1/2" Horizontal Double-Arm 24" (610 mm) High Pillar 15" x 10" x 1" (380 x 254 x 25 mm) Solid Cast Steel Base 38 lbs in Weight Manufactured under ISO 9001 Quality Control Standard Excellent Five (5) Year Factory Warranty Unbeatable Low Price Guaranteed or the Difference Back! Satisfaction Guaranteed or Your Money Back!