Our Marvoloc product is made and manufactured right here in the USA it is UL and CUL listed and passes all necessary NEC codes. It is one of the Most efficient ways to adapt any devices to a 4in square box and a
4-11/16 box with use of our 4-11/16 adapter. We also have a great product for round devices 15-60amp is done with only 2 plates. Marvoloc was invented in the early 2000s by Marvin Pinkowski and is now ran by his grandson Trevor Pinkowski.