Cover picture looks similar to this.
8-string set for the Bulgarian Tambura
BG18 TS - $17.
No price increase from 2015.
A few packets still available February 2019.
Each packet includes:
2 each of the following ball-end strings:
The tambura strings are manufactured in France to the specifications of Lyubomir Vladimirov, first tambura, Bulgarian National Radio, Sofia; the successor to the late Rumen Sirakov.
The attractive package uses the cover illustration of the Tanbur Bulghary tambura book.