Two (2) tube type 5Z3 General Electric vintage vacuum tubes, ST shape, made in USA,

tubes have black ribbed plates, clear top,  printed base,

top side rectangular double getters, same date codes EZ 188-5, tubes tests: 

90, 100 %

86, 92 %

Price is for all tubes pictured.

We test all tubes we sell! We will combine shipping! Check out my other tubes!

 Tested on Triplett tube tester for shorts and leaks as well.

Scale 1-100, good quality percentage on my Triplett starts at 54.