R-3 (Р-3) Argon filled gas discharge tube arrester spark gap tube LOT 1pcs.
Arrester R-3
Also, this product may be called: P 3, P3, r-3, r 3, r3.
 
R-3 arresters are widely used in various electrical, radio and control instruments. Detailed specifications are shown below. We give a guarantee against defects or other inconsistencies in technical documentation. For the purchase of R-3, please contact the sales department. Our managers will provide all the information you are interested in regarding the price, availability, delivery time, warranty, or answer any other questions.
 
Arrester R-3
High-frequency switching spark gap.
Arrester R-3 is designed to protect communication lines and equipment from overvoltage.
Good quality for a small price!
Made in USSR.
LOT  1pcs. 
Thanks And Good luck!