These conductive earthing mats are designed to ground all the electric and dirty electric fields. 
 
This medium sized one is 65cm x 25cm and is useful for computers, keyboard and mouse. It is also useful as a foot grounding mat in an office or other home environment.
 
Made from durable conductive rubber.
 
Complete with 5m cord and NZ plug adaptor.
 
Easy to clean and air dry.