BBB Accredited Business Profile

Master Magnetics Inc

Master Magnetics Inc

(303) 688-3966

Master Magnetics Inc

41 years in business
747 S Gilbert St
Castle Rock, CO 80104-2262
Fax Numbers
  • (303) 688-5303
Additional Phone Numbers
  • (800) 525-3536
Additional Email Addresses
BBB File Opened: 11/18/1988
Business Started: 07/19/1976
Business Started Locally: 07/19/1976
Business Incorporated: 07/19/1976 in CO
Type of Entity
Business Management
  • Customer Service: Ms. Jennifer Brown, COO
  • Principal: Mr. John Nellessen, Owner/Manager
  • Mr. Mark Richards
  • Mr. Mike Gertz
Contact Information
  • Customer Service: Ms. Jennifer Brown, COO
  • Principal: Mr. John Nellessen, Owner/Manager
  • Mr. Mark Richards
  • Mr. Mike Gertz
Business Category
  • Magnets & Magnetic Devices
  • Advertising Specialties

Products & Services
We specialize in permanent magnets, flexible magnetic sheeting, magnetic assemblies, and retail-packaged magnets. Over 15 million magnets stocked. Large warehousing capabilities and 2 regional production & distribution facilities.
Alternate Business Names
  • The Magnet Source



Master Magnetics, Inc. (The Magnet Source®) is a manufacturer and distributor of permanent magnets, magnetic devices and assemblies, and flexible magnetic material for all types of industrial, OEM, printing, and resale markets.

BBB Reason for Ratings

BBB rating is based on 13 factors: Get the details about the factors considered.

Business Profile

Business Profile

Licensing information is provided in the BBB Business Profiles to inform the public about industries that may require professional licensing, bonding, or registration. Better Business Bureau encourages you to check with the appropriate agency to be certain any requirements are currently being met.

BBB promotes truth in advertising by contacting advertisers whose claims conflict with the BBB Code of Advertising. These claims come to our attention from our internal review of advertising, consumer complaints and competitor challenges. BBB asks advertisers to substantiate their claims, change ads to make offers more clear to consumers, and remove misleading or deceptive statements.

BBB reports on known significant government actions involving the business's marketplace conduct.

BBB reports on a company that is out of business for three years from the date the company closes its doors or ceases to do business.

BBB reports on unauthorized use of the Better Business Bureau's name and/or logo for as long as the business continues to use it in any advertising, or for one year after the business ceases any repeated unauthorized uses.

BBB reports on a business’s bankruptcy as long as the business remains in bankruptcy.

BBB reports when mail sent to the business was returned by the Postal Service.

Master Magnetics Inc

Master Magnetics Inc


Customer Review Rating:


Composite Score:

0 3
Request a Quote