Complete: test piece delivered with 3 metal core balls of different densities to study 3 different fall regimes

• 1 colour per ball for immediate recognition on video
  
• 1 powerful and directive magnet to easily retain the chosen ball
  
• Graduated scale built into the stand to calibrate videos
  
• Tube: transparent PMMA, Ø 50 mm, length 550 mm
  
• Stand: thick and rigid plastic with double screen printed scale
  
• Hatch for tube filling with O-ring and screw closure
  
• Delivered with: 3 metal core balls (red, green, grey) and a powerful pawn-shaped magnet for easy grip.
  
  Tube for testing a ball falling into a fluid
  + 3 balls
  +magnet