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Leading manufacturer in the vacuum products industry


About Us


GREENSTONE is fast becoming the leader in the Vacuum Industry manufacturing products such as Vacuum Tubes, Vacuum Capacitor, Vacuum Relays, Vacuum Contactors and Vacuum  Interrupters. Our research and development program has allowed us to stay one step ahead of the competition by manufacturing quality Vacuum Products that are beyond compare for the last 25 years.

GREENSTONE extensive inventory assures you that we will have the products when you need them, this allows us to guarantee same day shipping on all orders placed by 5:00 p.m. Eastern time, which in turn guarantees next day delivery of your order. We carry a wide selection of Radio Transmitter and TV Transmitter Vacuum tubes and Vacuum capacitors and offer an excellent warranty period. We also manufacture Vacuum contactors and we supply the Mining, Power, Pulp and Petrochemical equipment manufacturers. Whether it is an in stock item or a custom order, GREENSTONE is here to fill all of your needs and we look forward to serving you.

GREENSTONE manufactures replacement parts for equipment manufacturers such as: Harris Transmitters, Continental Electronics, Radio Frequency Services, Alloyd , Thermex Thermatron , MarkPeri , Rosenquist, Nemeth Engineering , L & L Machinery , RFC , HFT , Kabar , LaRose, Rosenquist, and many others. We also manufacture many different types of Fixed Vacuum capacitors, Variable capacitors and Watercooled Vacuum capacitors for many different applications. Our Vacuum products are used by many oem's in the US and overseas.