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GRI MM100-B Magnet, Rare Earth, 1/2" x 0.375", Brown

Special Order: typically 2–6 weeks

Ships directly from the manufacturer. This is an estimated lead time, not a guaranteed delivery date.

Availability can change and lead times may be longer. If your project has a deadline, check with us before ordering.

A member of our team will check with the manufacturer and personally reply by email.

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Key Features

  • Delivers consistent, high-strength activation for reed switches and door/window sensors, improving security system reliability
  • Compact 1/2" x 0.375" size fits tight or recessed installations for a clean, unobtrusive installation
  • Rare-earth construction provides superior magnetic pull in a small footprint for dependable monitoring
  • Brown finish blends with wood and frame applications for discreet placement in residential and commercial sites
  • US-made (MM100-B by George Risk Industries) ensures consistent quality and compatibility with industry contact sensors

Quick Specifications

Product Model
MM100-B
Brand Name
George Risk Industries
Manufacturer Part Number
MM100-B
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Product information

MM100-B

Overview

Ensure dependable sensor activation and discreet installation with the GRI MM100-B rare-earth contact magnet. This George Risk Industries contact magnet is engineered to provide reliable magnetic pull in a compact 1/2" x 0.375" package, making it ideal for door and window contacts used in security, surveillance, and access control systems. The rare-earth magnet delivers strong, consistent performance to reduce nuisance trips and ensure accurate monitoring of entry points. Finished in brown for inconspicuous mounting on wood frames and trim, the MM100-B (manufacturer part number MM100-B) is a versatile choice for both commercial and residential installations. Its small footprint lets installers position the magnet precisely for optimal sensor alignment while maintaining a low-profile appearance. Made in the USA, this contact magnet supports long-term system reliability when paired with reed switches and monitoring hardware. If you need a compact, high-strength magnet for intrusion detection, alarm contacts, or remote monitoring sensors, add the GRI MM100-B to your parts list and improve the performance of your security installations.

Features

  • Delivers consistent, high-strength activation for reed switches and door/window sensors, improving security system reliability
  • Compact 1/2" x 0.375" size fits tight or recessed installations for a clean, unobtrusive installation
  • Rare-earth construction provides superior magnetic pull in a small footprint for dependable monitoring
  • Brown finish blends with wood and frame applications for discreet placement in residential and commercial sites
  • US-made (MM100-B by George Risk Industries) ensures consistent quality and compatibility with industry contact sensors
3 of 3 specifications
Technical specifications for GRI MM100-B Magnet, Rare Earth, 1/2" x 0.375", Brown
General Information
Brand Name George Risk Industries
Manufacturer Part Number MM100-B
Miscellaneous
Country of Origin US

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SKU:
MM100-B
Manufacturer part:
MM100-B
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When will this item ship?

Availability is shown above. Special-order items and project quantities may need additional lead time. Contact us to confirm a delivery date before scheduling installation.

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What should I know about returns?

Returns require an approved RMA. Consult the linked return policy for deadlines and eligibility. For standard non-defective returns, eligible factory-sealed items carry a 15% restocking fee and customer-paid return shipping; open-box and used items are refused. Defective and DOA claims follow the policy's separate terms. Special orders and other exclusions are final sale.

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GRI MM100-B Magnet, Rare Earth, 1/2" x 0.375", Brown

MM100-B

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