Crochet hooks with small mistakes

I would have liked to have liked a few centimeters longer, hence wider pieces can-be crochet as only about 10 cm wide crochet projects are worked reasonably comfortable. Otherwise you have to resort to a dual needle with flexible connection.
To explain: I do not use needles for crocheting normal, but for a derived from the Tunisian crochet technique, alternately crocheted in two contradictory strands in contrasting colors and the work has to be reversed. For this you need a needle with two hooks (Double-Ended Hook Stitches).

However, I am bothered two other points: The needle sizes are not stamped, but printed only bilig and start very soon to disappear. If you use the needle often, the strength you can not read then.
Since only the needles in the supplied vinyl bag remains to be and mark with stickers or compare with other needles.
Double needles can be tested with a standard needle gauge, unfortunately not.

The aforementioned vinyl bag itself smells extremely plasticky, is probably "Made in China".