Ball Bearing Boom Stand with Heavy Base

This ball bearing boom stand for stereo microscopes has a heavy duty base. Dimensions are as follows:

• Ball bearing arm has 12.5" horizontal motion.
  
• Vertical pole = 25"
• Vertical pole diameter = 1.5"
• Base dimensions = 13 x 13 x 1.5" (330 x 330 x 38mm) with carrying handles
  
• Base Weight = 78lbs.
• Includes anodized aluminum safety clamp with quick-release handle
  
• Total weight = 105 lbs.
• Your choice of 20mm, 25mm, 32mm arbor (straight mounting post), or no arbor (5/8" mounting pin opening)