Dual Arm Boom Stand Articulating Clamp Holder Bracket 76mm Microscope Stand Single Aluminum Arm Boom Stand for Stereo Microscope Tube Mount for Trinocular Stereo Zoom Microscopic Accessories. Articulating Stand with 50mm/76mm focusing rack clamp for microscope HDMI camera. 

Features:
Expand the scope of operations, any orientation and angle observed the objectives.
Boom Stand: 20" double-arm (overall length: 30"), 17" high pillar, 10-1/4"x8-1/4"x2-0" solid cast steel base
Steel Gears on Focusing Holder.
Standard Size Focusing Holder - Will Fit Scope Heads with Diameter of 76mm

Package Including:
1 x Microscope Bracket