This is a single arm heavy-duty boom stand for stereo microscopes. It comes with solid pillar and horizontal arm. It is brand new in factory sealed box. Features & Specifications: A Versatile Boom Stand Covering Large Working Area Solid Single Arm Design for Heavy-duty Applications 22" Horizontal Solid Single-Arm 20" (510 mm) High Pillar 15" x 10" x 1" (380 x 254 x 25 mm) Solid Cast Steel Base 50 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!