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GREENSTONE USA has been a premier manufacturer of vacuum capacitors, vacuum tubes, vacuum contactors, vacuum relays and vacuum interrupters for the last 25 years.

Our innovative development and ISO 9001 certified factory production ensure that the reliability of our products will ensure the success of your business. Greenstone USA manufactures Jennings technology and Comet type vacuum capacitors. 

GREENSTONE USA understands that every business is unique and has both standard and custom needs; this is why our factory manufactures both stock and custom orders. Our speed, efficiency, quality and reliability allow you to purchase confidently from us, and are the reasons why OEMs worldwide purchase from Greenstone USA.

GREENSTONE USA has unmatched customer service. Our time is world time, and no matter where your location, Greenstone USA will be able to send you vacuum products where you need them, when you need them, how you need them. 

GREENSTONE USA has an extensive inventory of vacuum products to ensure that we will have the products when you need them. If you place an in-stock order by 5:00 p.m. Eastern Standard Time, we guarantee that your order will leave our facilities on that day. This guarantees you delivery as soon as the next business day. 

GREENSTONE USA is here to fill all of your in-stock and custom order needs, and we look forward to serving you!