This is a very small solder spool like the ones that come with the USB-Soldering-Iron: Parkside PLKA 4 B3. 

Very fast and solid print. I designed a little insert hole for the solder so you can refill the spools very easy and fast.

Ater printing I super-glued both parts together with a tiny little drop. The layer adhesion of both parts is very well even without glue, but I recommend to use some. I marked the insert hole with red spray paint. It is not necessary but it is easier to find the hole again :-)

Printed in Sunlu PLA+ Black 

0.24mm Layer hight / 3 perimeters / 100% Infill 

If you want you can print a lot of these, fill them up and build a solder pyramid :-)   

Sorry just kidding !!!