We are a trusted manufacturer of top-quality products, made in the USA, serving customers in the electrical industry. Our focus on innovation and efficiency allows us to deliver exceptional products, including our GFCI/Deco Insert and the versatile Marvoloc product line, at competitive prices. Whether you need a Single Gang Marvoloc or a Two Gang Marvoloc, explore our website to learn more about our capabilities and how we can meet your needs.

Single Gang Marvoloc cover, sold without inserts, is compatible with all items in our Marvoloc product line, including the GFCI/Deco Insert. This design saves up to 2 minutes of labor per device, making it an efficient choice for installations. PN:1GR.

This Two Gang Marvoloc is designed to accept all of our Marvoloc inserts, including the GFCI/Deco Insert. Sold without inserts, this product can save up to 2 minutes of labor per device. Part Number: 2GR.

Duplex Insert compatible with all products in our Marvoloc product line, including the Single Gang Marvoloc and Two Gang Marvoloc options. PN: GRI-P

Switch Insert. Compatible with all products in our Marvoloc product line, including both Single Gang Marvoloc and Two Gang Marvoloc covers. PN: GRI-S

The GFCI/Deco Insert is compatible with all products in our Marvoloc product line, including both the Single Gang Marvoloc and the Two Gang Marvoloc. PN:GRI-D

Contractor Pack. Our best-selling package includes a variety of items from our Marvoloc product line, perfect for any project. This pack features: 10-1GR, 6-2GR, 10-GRI-D, 10-GRI-P, and 8-GRI-S, which includes options for both Single Gang Marvoloc and Two Gang Marvoloc installations. Don't forget the essential GFCI/Deco Insert. PN:CPRI-1
For your order of GFCI/Deco Insert products, including our Single Gang Marvoloc and Two Gang Marvoloc options, please contact us at Trevor@tremarcorpinc.com or call (262)-682-8137.
Copyright © 2026 www.tremarcorpinc.com - All Rights Reserved.