what is heavy duty slides/runners?

• Heavy duty slides is a type odf slides with full extension fuction and high loading rate.It is normally be divided as  ball beaing and non-ball bearing.
  
• Ball beraing heavy duty slides range from 53mm,57mm,71mm to76mm ect according to its height. Cold rolled hard plate as it raw material normally with thickness 2.0-2.5mm,length covers 10-60 inch (250-1500mm),and loading rate can be 90-230Kg.  
• Application:  Heavy duty runners widely used in fire trucks, ambulances, automatic teller machines, Web servers, heavy-duty cabinets, tool drawer cabinet ovens, freezers, vending machines, and military products. 
• Features: lower noise, smooth , long service life, corrosion resistance, anti-shock buffer and so on.
• Finish: Zinc plated, black