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The Cole-Parmer Roto-Torque Heavy Duty Rotator Model 7637 was designed to mix test tubes, flasks, and bottles at variable speeds. It provides vigorous or gentle agitation for adjustable rotation for its samples. The Cole-Palmer Roto-Torque heavy duty rotator can be used for aerating cultures, biological samples in suspension, general mixing, preparing homogeneous dispersion and more. 

Specifications:

• Electrical data: 115 VAC, 50/60 Hz
  
• Speed: 3 to 80 RPM
  
• Operating temperature: up to 40°C
  
• Relative humidity: 20% to 80%
  
• Dimensions: 8" W x 8" H x 9.25" D (20.32 x 20.32 x 24.13 cm)