This is a ball-bearing dual-arm heavy-duty boom stand for stereo microscopes. The ball-bearing design allows users to make horizontal adjustment at the touch of a finger. The holder ring of the focusing rack is 3" (76mm) in diameter. This boom stand weighs about 40 lbs.

Features & Specifications:

• Ball-Bearing Design for Easy Operation
• Easy to Make Horizontal Adjustment the Touch of a Finger
• Versatile Dual Arm Boom Covering Large Working Area
• 22-1/2" Horizontal Double-Arm
• 15" (381 mm) High Pillar
• 11 1/8" x 10 1/4" x 7/8" (284 x 260 x 22 mm) Solid Cast Steel Base
• 40 lbs in Weight
• Manufactured under ISO 9001 Quality Control Standard

Packing List:

• One Dual-Arm with Ball Bearing Design
• One Focusing Rack
• One Pillar
• One Solid Cast Steel Base
• User's Manual Download