K-4 or DJG-4 heavy duty straight keys were made for the Chinese army.
They were purchased from the Chinese army as surplus.
It is great for hamradio and professional use, also a good choice to your collection.

They are in factory new condition, NOS.

The keys have adjustable machined needle bearings, chrome plating, a felt pad on the base. The contacts are made of 99.95% pure hard silver, with the contact resistance of only 0.005 ohm. They weigh around two and a quarter pounds each.

They are 2-1/4 high, base dimensions are 4-3/4 x 2-1/2. The knob of handle is forward of the base about 1-1/2.

Payment or contact is expected within 3 days of the end of the auction.
Shipped on cleared receipt of payment.
We cannot be responsible for damage or lost items in transit if not insured.