Plunger for solder dispenser SR-SH51 (for Alpha Metals wire solder)

Plunger for solder dispenser [SR-SH51](http://www.tme.eu/en/details/sr-sh51/soldering-iron-stands-feeders/) was designed to hold [Alpha Metals](http://www.alphametals.ru/) wire solder (all series). Default plunger have bigger diameter and don't compilant with wire solders from [Alpha Metals](http://www.alphametals.ru/)