GREENSTONE USA  is fast becoming the leader in the manufacturing of vacuum tubes , vacuum capacitor, vacuum interrupters & vacuum relays. Our research and development program has allowed us to stay one step ahead of the competition by manufacturing quality vacuum tubes, vacuum capacitors, vacuum interrupters & vacuum relays that are beyond compare for the last 25 years.

GREENSTONE USA's extensive inventory assures you that we will have the part you are looking for 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 also guarantee the lowest prices on all our vacuum tubes, vacuum capacitors, vacuum interrupters and vacuum relays.

In the event you do have special needs, GREENSTONE USA will custom manufacture vacuum tubes, vacuum capacitors, vacuum interrupters and vacuum relays that will fit your own application and specifications.

• Industrial vacuum tubes

• Broadcasting vacuum tubes

• Ham Radio vacuum tubes

• Audio vacuum tubes

• CW magnetrons

• Vacuum capacitors

• Vacuum interrupters

• Vacuum relays

• Aluminum extruded heatsinks