Heyco Bushings and Grommet Part Markings
Each Heyco bushing is marked with its' UL and CSA designation.  Below is a breakdown of the components that make up these designations.  Please note that these designations do not specify the color of the part.  Please reference the Heyco part number and not the UL/CSA designation marked on the part.
 
Snap Bushings Shorty Bushing