Duct Markers

Marking Services, Inc. duct markers are highly visible color coded markers make it easy to differentiate between different systems.

• Use MS-900 labels to identify the air flow and equipment in a Ductwork System
• Individual arrow markers can be used to designate direction of flow
• For indoor or outdoor line service identification and system color coding
• Markers can be customized to designate the specific system or equipment of origin
• MSI also offers engraved plastic duct markers.  Call for quote.
• Sized to meet the ASME-A13.1 Standard