About MSI

MSI is a worldwide leader in mechanical labeling, servicing the identification needs of mechanical, electrical and ammonia contractors. They have been advancing the use of pipe markers, valve tags and equipment signs to enhance overall operations of commercial, industrial, health care, educational and technology facilities for the last 20 years. Working directly with electrical, plumbing, HVAC, fire protection and ammonia refrigeration contractors of all sizes, MSI offers a complete line of mechanical identification to meet every labeling challenge with extremely fast fulfillment, industry best quality, and no minimum order requirements.


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